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Daylight hours in Saint John’s

Saint John’s gets 13h 09m of daylight on its longest day in June, and 11h 07m on its shortest in December — a difference of 2h 02m across the year.

How fast the days change

Around 17 March, Saint John’s gains or loses about 1.0 minutes of daylight every day.

Barely perceptible — near the equator the length of the day hardly changes at all, and the seasons announce themselves through rain and heat instead.

Sunrise and sunset by month

On the 15th of each month, in America/Antigua local time, daylight saving included.

MonthSunriseSunsetDaylightSolar noon
January 06:40 17:53 11h 13m 12:16
February 06:33 18:09 11h 36m 12:21
March 06:15 18:17 12h 02m 12:16
April 05:51 18:23 12h 32m 12:07
May 05:35 18:31 12h 56m 12:03
June 05:33 18:42 13h 09m 12:07
July 05:41 18:44 13h 03m 12:13
August 05:50 18:32 12h 42m 12:11
September 05:55 18:09 12h 14m 12:02
October 06:00 17:45 11h 45m 11:53
November 06:12 17:31 11h 20m 11:51
December 06:29 17:35 11h 07m 12:02

Solstices and equinoxes

DateSunriseSunsetDaylight
March equinox 20 Mar 06:11 18:18 12h 07m
June solstice 21 Jun 05:34 18:43 13h 09m
September equinox 22 Sep 05:56 18:03 12h 07m
December solstice 21 Dec 06:32 17:38 11h 06m

The equinoxes give almost exactly twelve hours of daylight everywhere on earth — "almost" because sunrise is defined by the sun's upper edge rather than its centre, and the atmosphere bends its light over the horizon before it has really arrived. Both lengthen the day by a few minutes.

Assumptions

  • Sea-level horizon. Hills, mountains and buildings all delay sunrise and bring sunset forward, sometimes by a lot in a valley.
  • Standard refraction. Sunrise is taken at −0.833°, allowing for the sun's disc and average atmospheric bending. Unusual air conditions shift it by a minute or two.
  • Local clock time, with daylight saving applied from the IANA timezone database.

Full methodology, sources and known limitations