Longest and shortest day in San Juan
In San Juan, Puerto Rico, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 13h 14m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 11h 1m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:28 | 18:35 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 05:49 | 19:03 | 13h 14m |
| September equinox | Tuesday, 22 September 2026 | 06:13 | 18:20 | 12h 7m |
| December solstice | Monday, 21 December 2026 | 06:51 | 17:53 | 11h 1m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 06:59 | 18:08 | 11h 9m |
| February | 06:52 | 18:25 | 11h 33m |
| March | 06:32 | 18:34 | 12h 1m |
| April | 06:07 | 18:41 | 12h 34m |
| May | 05:50 | 18:50 | 13h 0m |
| June | 05:47 | 19:02 | 13h 14m |
| July | 05:56 | 19:04 | 13h 8m |
| August | 06:06 | 18:51 | 12h 45m |
| September | 06:12 | 18:26 | 12h 14m |
| October | 06:18 | 18:01 | 11h 44m |
| November | 06:31 | 17:46 | 11h 16m |
| December | 06:48 | 17:50 | 11h 2m |
Why the day gets longer and shorter in San Juan
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, San Juan leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far San Juan sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in San Juan
When is the longest day in San Juan?
The longest day in San Juan falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 13h 14m of daylight, sunrise at 05:49 and sunset at 19:03.
When is the shortest day in San Juan?
The shortest day in San Juan falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 11h 1m of daylight, sunrise at 06:51 and sunset at 17:53.
How much does day length change through the year in San Juan?
Between the longest and shortest day, San Juan gains and loses about 2h 13m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from San Juan's coordinates with SunCalc, not looked up from a table.