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Annual Daylight Cycle Table |
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Written by Patrick Thrush
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Saturday, 29 March 2008 |
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Annual Daylight Cycle in Various
Latitudes
This chart and table demonstrates the seasonal variation in the number of hours of daylight at different latitudes of the world. The further one moves away from the Equator, the greater the difference in hours. In the torrid zone (the band of the Earth between the Tropics of Cancer and Capricorn, and highlighted in yellow on the table), the range may vary from an exact equal number of daylight to dark hours, to as much as 3½ hours difference between summer and winter seasons.
To find the number of daylight hours at any time of the year, first select the latitude from the left or side of the map for your area of interest, and then refer to the table below.
Select a
Latitude:
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Subantarctic Temperate Zone Latitude 60°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
|
Mar 1
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Mar 16
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Hours light
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18.34
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17.65
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16.49
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15.22
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14.04
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12.65
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.16
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9.78
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8.43
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7.19
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6.12
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5.57
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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5.62
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6.26
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7.38
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8.64
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10.09
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11.48
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.87
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14.26
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15.69
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16.91
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17.90
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18.44
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Choose
Latitude
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Southern Temperate Zone Latitude 55°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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17.00
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16.50
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15.63
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14.63
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13.68
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12.54
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.31
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10.18
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9.09
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8.13
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7.33
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6.94
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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6.97
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7.43
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8.27
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9.26
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10.43
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11.57
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.72
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13.85
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15.00
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15.95
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16.68
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17.07
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Choose
Latitude
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Southern Temperate Zone Latitude 50°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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16.07
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15.68
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14.99
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14.18
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13.39
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12.45
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.42
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10.48
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9.59
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8.81
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8.19
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7.88
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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7.91
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8.26
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8.93
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9.73
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10.69
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11.64
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.60
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13.54
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14.48
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15.25
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15.82
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16.12
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Choose
Latitude
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Southern Temperate Zone Latitude 45°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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15.36
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15.05
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14.49
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13.82
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13.17
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12.38
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.52
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10.73
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9.99
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9.35
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8.84
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8.60
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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8.62
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8.90
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9.44
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10.10
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10.90
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11.70
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.50
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13.29
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14.07
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14.70
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15.17
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15.40
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Choose
Latitude
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Southern Temperate Zone Latitude 40°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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14.79
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14.54
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14.08
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13.52
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12.98
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12.32
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.59
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10.93
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10.32
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9.79
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9.37
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9.18
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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9.19
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9.42
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9.87
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10.41
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11.08
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11.75
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.42
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13.08
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13.73
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14.25
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14.63
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14.83
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Choose
Latitude
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Southern Temperate Zone Latitude 35°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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14.31
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14.11
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13.73
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13.27
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12.82
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12.26
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.66
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11.11
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10.60
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10.16
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9.82
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9.66
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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9.67
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9.86
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10.23
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10.68
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11.23
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11.79
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.35
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12.90
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13.44
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13.87
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14.18
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14.34
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Choose
Latitude
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Southern Subtropical Temperate Latitude 30°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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13.90
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13.73
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13.42
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13.04
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12.67
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12.22
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.72
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11.27
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10.85
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10.49
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10.21
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10.08
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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10.09
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10.25
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10.54
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10.91
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11.37
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11.83
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.29
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12.74
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13.19
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13.54
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13.79
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13.92
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Choose
Latitude
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Torrid Zone Latitude 25°S (Tropic of Capricorn 23.4°S)
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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13.53
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13.39
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13.15
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12.84
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12.54
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12.18
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.77
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11.41
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11.07
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10.78
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10.56
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10.46
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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10.46
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10.59
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10.83
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11.12
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11.49
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11.86
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.23
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12.60
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12.96
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13.24
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13.44
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13.55
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Choose
Latitude
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Torrid Zone Latitude 20°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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13.19
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13.09
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12.89
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12.66
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12.42
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12.14
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.82
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11.54
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11.28
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11.05
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10.88
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10.80
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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Sep 16
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Hours light
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10.80
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10.90
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11.08
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11.32
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11.60
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11.89
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Date
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Oct 1
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Oct 16
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Nov 1
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Nov 16
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Dec 1
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Dec 16
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Hours light
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12.18
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12.47
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12.75
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12.97
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13.12
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13.20
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Choose
Latitude
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Torrid Zone Latitude 15°S
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Date
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Jan 1
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Jan 16
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Feb 1
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Feb 16
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Mar 1
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Mar 16
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Hours light
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12.87
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12.80
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12.66
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12.48
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12.31
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12.10
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Date
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Apr 1
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Apr 16
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May 1
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May 16
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Jun 1
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Jun 16
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Hours light
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11.87
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11.66
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11.47
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11.30
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11.18
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11.12
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Date
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Jul 1
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Jul 16
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Aug 1
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Aug 16
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Sep 1
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