Casper
Sunrise and sunset in Casper
Today’s sunrise, sunset and twilight in Casper, in local time. At 42.9° N, the day lasts from 9 h 01 min at the winter solstice to 15 h 21 min at the summer solstice.
Today · worked out at
Thursday, October 22: sunrise at 07:27, sunset at 18:11.
Day length 10 h 44 min, 2 min 44 s shorter than yesterday.
Solar noon at 12:49, with the Sun 36° above the horizon.
Times are Casper time (MDT).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 05:52 | 19:46 |
| Nautical twilight | 06:25 | 19:13 |
| Civil twilight | 06:58 | 18:40 |
| Sunrise and sunset | 07:27 | 18:11 |
| Golden hour | 07:27–08:06 | 17:32–18:11 |
Each twilight begins at the morning time and ends at the evening one.
The year in Casper
- Longest day: June 21, 15 h 21 min, from sunrise at 05:26 to sunset at 20:47.
- Shortest day: December 21, 9 h 01 min, from sunrise at 07:32 to sunset at 16:34.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 07:29 | 17:04 | 9 h 34 min |
| February 21 | 06:53 | 17:44 | 10 h 51 min |
| March 21 | 07:06 | 19:18 | 12 h 12 min |
| April 21 | 06:13 | 19:54 | 13 h 41 min |
| May 21 | 05:36 | 20:27 | 14 h 51 min |
| June 21 | 05:26 | 20:47 | 15 h 21 min |
| July 21 | 05:45 | 20:37 | 14 h 51 min |
| August 21 | 06:18 | 19:57 | 13 h 40 min |
| September 21 | 06:51 | 19:04 | 12 h 12 min |
| October 21 | 07:26 | 18:12 | 10 h 47 min |
| November 21 | 07:04 | 16:37 | 9 h 32 min |
| December 21 | 07:32 | 16:34 | 9 h 01 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 42.9° N, 106.3° 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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