Longmont
Sunrise and sunset in Longmont
Today’s sunrise, sunset and twilight in Longmont, in local time. At 40.2° N, the day lasts from 9 h 19 min at the winter solstice to 15 h 02 min at the summer solstice.
Today · worked out at
Thursday, October 22: sunrise at 07:18, sunset at 18:10.
Day length 10 h 52 min, 2 min 29 s shorter than yesterday.
Solar noon at 12:44, with the Sun 39° above the horizon.
Times are Longmont time (MDT).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 05:47 | 19:40 |
| Nautical twilight | 06:19 | 19:09 |
| Civil twilight | 06:51 | 18:37 |
| Sunrise and sunset | 07:18 | 18:10 |
| Golden hour | 07:18–07:56 | 17:32–18:10 |
Each twilight begins at the morning time and ends at the evening one.
The year in Longmont
- Longest day: June 21, 15 h 02 min, from sunrise at 05:31 to sunset at 20:33.
- Shortest day: December 21, 9 h 19 min, from sunrise at 07:19 to sunset at 16:37.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 07:17 | 17:06 | 9 h 49 min |
| February 21 | 06:45 | 17:43 | 10 h 58 min |
| March 21 | 07:01 | 19:13 | 12 h 12 min |
| April 21 | 06:13 | 19:45 | 13 h 32 min |
| May 21 | 05:39 | 20:15 | 14 h 35 min |
| June 21 | 05:31 | 20:33 | 15 h 02 min |
| July 21 | 05:48 | 20:24 | 14 h 36 min |
| August 21 | 06:17 | 19:48 | 13 h 31 min |
| September 21 | 06:47 | 18:58 | 12 h 12 min |
| October 21 | 07:17 | 18:11 | 10 h 54 min |
| November 21 | 06:52 | 16:39 | 9 h 46 min |
| December 21 | 07:19 | 16:37 | 9 h 19 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 40.2° N, 105.1° 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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