Sunrise and Sunset times in Boulder, United States 
Today:
 Sunrise: 06:57:26
|
 Sunset: 18:21:49
|
Day Length: 11h 24m 23s
Time zone: America/Denver, UTC -7 h.
Latitude: 46.2358, Longitude: -112.12
Boulder
Montana, United States 
1 248 people
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2026-Mar-01, Sunday | 07:06:41 | 12:40:43 | 18:14:45 | 11h 8m 4s |
| 2026-Mar-02, Monday | 07:04:51 | 12:40:31 | 18:16:10 | 11h 11m 19s |
| 2026-Mar-03, Tuesday | 07:03:01 | 12:40:18 | 18:17:36 | 11h 14m 35s |
| 2026-Mar-04, Wednesday | 07:01:10 | 12:40:05 | 18:19:00 | 11h 17m 50s |
| 2026-Mar-05, Thursday | 06:59:18 | 12:39:52 | 18:20:25 | 11h 21m 7s |
| 2026-Mar-06, Friday | 06:57:26 | 12:39:38 | 18:21:49 | 11h 24m 23s |
| 2026-Mar-07, Saturday | 06:55:34 | 12:39:24 | 18:23:13 | 11h 27m 39s |
| 2026-Mar-08, Sunday | 07:53:40 | 13:39:09 | 19:24:37 | 11h 30m 57s |
| 2026-Mar-09, Monday | 07:51:47 | 13:38:54 | 19:26:01 | 11h 34m 14s |
| 2026-Mar-10, Tuesday | 07:49:53 | 13:38:38 | 19:27:24 | 11h 37m 31s |
| 2026-Mar-11, Wednesday | 07:47:58 | 13:38:23 | 19:28:47 | 11h 40m 49s |
| 2026-Mar-12, Thursday | 07:46:03 | 13:38:07 | 19:30:10 | 11h 44m 7s |
| 2026-Mar-13, Friday | 07:44:08 | 13:37:50 | 19:31:33 | 11h 47m 25s |
| 2026-Mar-14, Saturday | 07:42:12 | 13:37:34 | 19:32:55 | 11h 50m 43s |
| 2026-Mar-15, Sunday | 07:40:17 | 13:37:17 | 19:34:17 | 11h 54m 0s |
| 2026-Mar-16, Monday | 07:38:21 | 13:37:00 | 19:35:39 | 11h 57m 18s |
| 2026-Mar-17, Tuesday | 07:36:24 | 13:36:43 | 19:37:01 | 12h 0m 37s |
| 2026-Mar-18, Wednesday | 07:34:28 | 13:36:25 | 19:38:23 | 12h 3m 55s |
| 2026-Mar-19, Thursday | 07:32:31 | 13:36:08 | 19:39:44 | 12h 7m 13s |
| 2026-Mar-20, Friday | 07:30:34 | 13:35:50 | 19:41:06 | 12h 10m 32s |
| 2026-Mar-21, Saturday | 07:28:38 | 13:35:32 | 19:42:27 | 12h 13m 49s |
| 2026-Mar-22, Sunday | 07:26:41 | 13:35:14 | 19:43:48 | 12h 17m 7s |
| 2026-Mar-23, Monday | 07:24:44 | 13:34:56 | 19:45:09 | 12h 20m 25s |
| 2026-Mar-24, Tuesday | 07:22:47 | 13:34:38 | 19:46:30 | 12h 23m 43s |
| 2026-Mar-25, Wednesday | 07:20:50 | 13:34:20 | 19:47:50 | 12h 27m 0s |
| 2026-Mar-26, Thursday | 07:18:53 | 13:34:02 | 19:49:11 | 12h 30m 18s |
| 2026-Mar-27, Friday | 07:16:57 | 13:33:44 | 19:50:32 | 12h 33m 35s |
| 2026-Mar-28, Saturday | 07:15:00 | 13:33:26 | 19:51:52 | 12h 36m 52s |
| 2026-Mar-29, Sunday | 07:13:03 | 13:33:08 | 19:53:12 | 12h 40m 9s |
| 2026-Mar-30, Monday | 07:11:07 | 13:32:50 | 19:54:33 | 12h 43m 26s |
| 2026-Mar-31, Tuesday | 07:09:11 | 13:32:32 | 19:55:53 | 12h 46m 42s |
Day length in Boulder during the year on the chart:
Boulder on United States map:
Locations in the same time zone America/Denver
Denver (Colorado), Salt Lake City (Utah), El Paso (Texas), Albuquerque (New Mexico), Colorado Springs (Colorado), Ogden (Utah), Provo (Utah), Aurora (Colorado), Fort Collins (Colorado), Lakewood (Colorado), Pueblo (Colorado), Thornton (Colorado), Grand Junction (Colorado), West Valley City (Utah), Las Cruces (New Mexico), Greeley (Colorado), Billings (Montana), Arvada (Colorado), St. George (Utah), West Jordan (Utah), Westminster (Colorado), Centennial (Colorado), Santa Fe (New Mexico), Highlands Ranch (Colorado), Logan (Utah), Longmont (Colorado), Orem (Utah), Rio Rancho (New Mexico), Sandy (Utah), Lafayette (Colorado)
Largest populated areas in United States
New York (New York), Los Angeles (California), Chicago (Illinois), Miami (Florida), Dallas (Texas), Philadelphia (Pennsylvania), Houston (Texas), Washington (District of Columbia), Atlanta (Georgia), Boston (Massachusetts), Phoenix (Arizona), Seattle (Washington), San Francisco (California), Detroit (Michigan), San Diego (California), Minneapolis (Minnesota), Tampa (Florida), Denver (Colorado), Brooklyn (New York), Queens (New York), Baltimore (Maryland), Riverside (California), St. Louis (Missouri), Las Vegas (Nevada), Portland (Oregon), San Antonio (Texas), Sacramento (California), San Jose (California), Orlando (Florida), Cleveland (Ohio)
Countries closest to United States
*Calculation of distances from capital to capital
Daylight Hours FAQ: 10 Most Googled Questions Answered
Daylight hours refer to the period between sunrise and sunset. This duration changes throughout the year based on season and geographic location.
Earth's 23.5° axial tilt causes uneven sunlight distribution. Your hemisphere receives less direct sunlight in winter (shorter days) and more in summer (longer days).
Northern Hemisphere: June 20-22 (summer solstice).
Southern Hemisphere: December 21-23.
Near polar circles, the sun doesn't set for 24 hours.
Northern Hemisphere: December 21-22 (winter solstice).
Southern Hemisphere: June 20-21.
The closer to poles, the more extreme variations:
- Equator: ~12-hour days year-round
- Polar regions: Midnight sun/polar nights occur
Miami's lower latitude means:
- Winter days are longer than NY's
- Summer days are slightly shorter
During equinoxes:
- Spring: March 20-21
- Fall: September 22-23
Most rapid change near equinoxes: 2-4 minutes daily.
Slowest change near solstices: <1 minute daily.
Reliable tools:
- Timeanddate.com
- SunCalc.org
- Photographer's Ephemeris app
Yes. Reduced winter sunlight may cause:
- Seasonal Affective Disorder (SAD)
- Vitamin D deficiency
Solution: Light therapy lamps & midday walks