Time in Boulder Co
Boulder: Mountain Time (MDT, UTC−7 in winter, UTC−6 in summer). US daylight saving applies.
Boulder keeps Mountain Time. A mid-June morning starts near 5:32 a.m.; the live reading is MDT, UTC−7 in winter, UTC−6 in summer.
Boulder is Mountain Time with Denver.
When it is noon in Boulder it is 2 p.m. in New York all year. When it is noon in Boulder it is 7 p.m. in London all year.
Boulder sits close to the Mountain Time meridian (105°), so clock noon and solar noon are not far apart.
Mid-January sunrise here is within a few minutes of Denver.
Sunrise and sunset in Boulder
A typical mid-January day in Boulder has sunrise around 7:22 a.m. and sunset around 5:00 p.m. (9 h 38 m of daylight). Mid-June stretches to about 5:32 a.m.–8:32 p.m. (15 h 00 m).
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 7:22 a.m. | 5:00 p.m. | 9 h 38 m |
| February | 6:55 a.m. | 5:37 p.m. | 10 h 41 m |
| March | 7:14 a.m. | 7:08 p.m. | 11 h 53 m |
| April | 6:24 a.m. | 7:39 p.m. | 13 h 14 m |
| May | 5:47 a.m. | 8:09 p.m. | 14 h 22 m |
| June | 5:32 a.m. | 8:32 p.m. | 15 h 00 m |
| July | 5:45 a.m. | 8:30 p.m. | 14 h 45 m |
| August | 6:13 a.m. | 8:00 p.m. | 13 h 47 m |
| September | 6:42 a.m. | 7:12 p.m. | 12 h 30 m |
| October | 7:11 a.m. | 6:23 p.m. | 11 h 12 m |
| November | 6:46 a.m. | 4:46 p.m. | 10 h 00 m |
| December | 7:16 a.m. | 4:37 p.m. | 9 h 21 m |
Mid-month local times for 2026. Hills, weather, and the exact street change what you see by a few minutes.
Nearby cities
The live clock is the same TabClock face as the homepage.