Great Falls
Sunrise and sunset in Great Falls
Today’s sunrise, sunset and twilight in Great Falls, in local time. At 47.5° N, the day lasts from 8 h 26 min at the winter solstice to 15 h 58 min at the summer solstice.
Today · worked out at
Wednesday, October 21: sunrise at 07:52, sunset at 18:25.
Day length 10 h 33 min, 3 min 15 s shorter than yesterday.
Solar noon at 13:09, with the Sun 32° above the horizon.
Times are Great Falls time (MDT).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 06:10 | 20:08 |
| Nautical twilight | 06:45 | 19:32 |
| Civil twilight | 07:21 | 18:57 |
| Sunrise and sunset | 07:52 | 18:25 |
| Golden hour | 07:52–08:35 | 17:43–18:25 |
Each twilight begins at the morning time and ends at the evening one.
The year in Great Falls
- Longest day: June 21, 15 h 58 min, from sunrise at 05:27 to sunset at 21:26.
- Shortest day: December 21, 8 h 26 min, from sunrise at 08:10 to sunset at 16:36.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 08:03 | 17:10 | 9 h 07 min |
| February 21 | 07:19 | 17:58 | 10 h 38 min |
| March 21 | 07:25 | 19:39 | 12 h 14 min |
| April 21 | 06:25 | 20:23 | 13 h 58 min |
| May 21 | 05:41 | 21:03 | 15 h 22 min |
| June 21 | 05:27 | 21:26 | 15 h 58 min |
| July 21 | 05:50 | 21:12 | 15 h 23 min |
| August 21 | 06:29 | 20:26 | 13 h 57 min |
| September 21 | 07:10 | 19:24 | 12 h 14 min |
| October 21 | 07:52 | 18:25 | 10 h 33 min |
| November 21 | 07:38 | 16:42 | 9 h 04 min |
| December 21 | 08:10 | 16:36 | 8 h 26 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 47.5° N, 111.3° 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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