Greeley, CO · 2026
Sunrise and sunset in Greeley, Colorado
Short answer
- Longest day
- 15 h 04 min
- Shortest day
- 9 h 17 min
Greeley daylight through 2026
Daylight in Greeley runs from 9 h 17 min on December 21 to 15 h 04 min on June 21, a seasonal swing of 5 h 47 min between June 21 and December 21. That swing ranks 86th of 342 US cities of 100,000+, where 1st is the largest. Around the March equinox the city gets 12 h 09 min, and around the September equinox 12 h 09 min.
Greeley daylight by month
| Month | Average | Sunrise | Sunset |
|---|---|---|---|
| January | 9 h 41 min | 7:09 AM to 7:22 AM | 4:43 PM to 5:16 PM |
| February | 10 h 42 min | 6:34 AM to 7:08 AM | 5:17 PM to 5:49 PM |
| March | 11 h 58 min | 6:23 AM to 7:21 AM | 5:50 PM to 7:22 PM |
| April | 13 h 19 min | 5:59 AM to 6:42 AM | 7:23 PM to 7:53 PM |
| May | 14 h 27 min | 5:31 AM to 5:58 AM | 7:54 PM to 8:22 PM |
| June | 15 h 01 min | 5:28 AM to 5:32 AM | 8:23 PM to 8:33 PM |
| July | 14 h 43 min | 5:32 AM to 5:55 AM | 8:14 PM to 8:33 PM |
| August | 13 h 43 min | 5:56 AM to 6:25 AM | 7:32 PM to 8:13 PM |
| September | 12 h 26 min | 6:26 AM to 6:54 AM | 6:42 PM to 7:30 PM |
| October | 11 h 07 min | 6:55 AM to 7:27 AM | 5:56 PM to 6:41 PM |
| November | 9 h 57 min | 6:29 AM to 7:02 AM | 4:33 PM to 4:55 PM |
| December | 9 h 21 min | 7:03 AM to 7:22 AM | 4:32 PM to 4:42 PM |
Earliest sunrise, latest sunset and the clock
The earliest sunrise comes on June 8 at 5:28 AM and the latest sunset on June 22 at 8:33 PM. The latest sunrise is 7:27 AM on October 31. Daylight saving time starts and ends on March 8 and November 1, which shifts every clock time by an hour.
On standard time the clocks run 7 hours behind UTC, the time of the 105° W meridian. Greeley sits at 104.77° W, almost on that meridian, so clock noon and solar noon agree closely in winter. Solar noon is at 12:08 PM on January 15 and 1:05 PM on July 15.
Compared with nearby cities
Denver, the state capital, gets 4 minutes less daylight than Greeley on June 21 and 4 minutes more on December 21. Day length depends on latitude, so the table lists the paired cities from north to south.
| City | Latitude | June 21 | December 21 |
|---|---|---|---|
| Billings, MT | 45.79° N | 15 h 44 min | 8 h 40 min |
| Fort Collins, CO | 40.55° N | 15 h 05 min | 9 h 16 min |
| Greeley, CO | 40.42° N | 15 h 04 min | 9 h 17 min |
| Boulder, CO | 40.02° N | 15 h 01 min | 9 h 20 min |
| Thornton, CO | 39.92° N | 15 h 00 min | 9 h 20 min |
| Westminster, CO | 39.88° N | 15 h 00 min | 9 h 20 min |
| Arvada, CO | 39.83° N | 15 h 00 min | 9 h 21 min |
| Denver, CO | 39.76° N | 14 h 59 min | 9 h 21 min |
| Aurora, CO | 39.71° N | 14 h 59 min | 9 h 21 min |
| Lakewood, CO | 39.70° N | 14 h 59 min | 9 h 22 min |
Questions people ask
What is the longest day of the year in Greeley?
June 21, 2026, with 15 h 04 min of daylight: sunrise 5:29 AM, sunset 8:32 PM.
What is the shortest day in Greeley?
December 21, 2026, with 9 h 17 min: sunrise 7:18 AM, sunset 4:35 PM.
When is the latest sunset in Greeley?
8:33 PM on June 22, 2026. The earliest sunset is 4:32 PM on December 2.
What time zone is Greeley in?
America/Denver. Clocks change on March 8 (to MDT) and November 1 (to MST) in 2026.
Sources and data as of
Data as of: computed for 2026 at the Census internal point of Greeley, 40.417° N, 104.773° W; time zone from Open-Meteo.
- 01SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
- 02IANA time zone database (clock times and daylight saving rules)
How every number is computed: methodology. Spotted a wrong figure? Report an error.