San Marcos, Texas
Sunrise and sunset in San Marcos, Texas
Today’s sunrise, sunset and twilight in San Marcos, Texas, in local time. At 29.9° N, the day lasts from 10 h 13 min at the winter solstice to 14 h 04 min at the summer solstice.
Today · worked out at
Wednesday, October 21: sunrise at 07:37, sunset at 18:54.
Day length 11 h 17 min, 1 min 41 s shorter than yesterday.
Solar noon at 13:16, with the Sun 49° above the horizon.
Times are San Marcos, Texas time (CDT).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 06:17 | 20:14 |
| Nautical twilight | 06:45 | 19:46 |
| Civil twilight | 07:13 | 19:18 |
| Sunrise and sunset | 07:37 | 18:54 |
| Golden hour | 07:37–08:10 | 18:22–18:54 |
Each twilight begins at the morning time and ends at the evening one.
The year in San Marcos, Texas
- Longest day: June 21, 14 h 04 min, from sunrise at 06:31 to sunset at 20:35.
- Shortest day: December 21, 10 h 13 min, from sunrise at 07:23 to sunset at 17:36.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 07:26 | 17:59 | 10 h 33 min |
| February 21 | 07:05 | 18:25 | 11 h 20 min |
| March 21 | 07:34 | 19:43 | 12 h 10 min |
| April 21 | 06:58 | 20:02 | 13 h 04 min |
| May 21 | 06:35 | 20:21 | 13 h 47 min |
| June 21 | 06:31 | 20:35 | 14 h 04 min |
| July 21 | 06:44 | 20:31 | 13 h 47 min |
| August 21 | 07:02 | 20:06 | 13 h 04 min |
| September 21 | 07:19 | 19:29 | 12 h 10 min |
| October 21 | 07:37 | 18:54 | 11 h 17 min |
| November 21 | 07:01 | 17:33 | 10 h 32 min |
| December 21 | 07:23 | 17:36 | 10 h 13 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 29.9° N, 97.9° W, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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