Longest and shortest day in San Antonio
In San Antonio, United States, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 14h 2m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 10h 16m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 07:37 | 19:45 | 12h 8m |
| June solstice | Sunday, 21 June 2026 | 06:34 | 20:36 | 14h 2m |
| September equinox | Tuesday, 22 September 2026 | 07:22 | 19:30 | 12h 8m |
| December solstice | Monday, 21 December 2026 | 07:24 | 17:39 | 10h 16m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:29 | 17:57 | 10h 28m |
| February | 07:13 | 18:23 | 11h 10m |
| March | 07:43 | 19:42 | 11h 58m |
| April | 07:07 | 20:00 | 12h 53m |
| May | 06:41 | 20:19 | 13h 38m |
| June | 06:33 | 20:35 | 14h 1m |
| July | 06:44 | 20:35 | 13h 51m |
| August | 07:02 | 20:14 | 13h 12m |
| September | 07:18 | 19:38 | 12h 20m |
| October | 07:35 | 19:03 | 11h 28m |
| November | 06:58 | 17:38 | 10h 41m |
| December | 07:21 | 17:37 | 10h 16m |
Why the day gets longer and shorter in San Antonio
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, San Antonio 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 Antonio 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 Antonio
When is the longest day in San Antonio?
The longest day in San Antonio falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 14h 2m of daylight, sunrise at 06:34 and sunset at 20:36.
When is the shortest day in San Antonio?
The shortest day in San Antonio falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 10h 16m of daylight, sunrise at 07:24 and sunset at 17:39.
How much does day length change through the year in San Antonio?
Between the longest and shortest day, San Antonio gains and loses about 3h 46m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from San Antonio's coordinates with SunCalc, not looked up from a table.