Sunrise and Sunset times in Boulder, United States 
Today:
 Sunrise: 07:38:22
|
 Sunset: 17:34:41
|
Day Length: 9h 56m 19s
Time zone: America/Denver, UTC -7 h.
Latitude: 37.9228, Longitude: -111.432
Boulder
Utah, United States 
240 people
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2026-Jan-01, Thursday | 07:41:31 | 12:29:26 | 17:17:21 | 9h 35m 50s |
| 2026-Jan-02, Friday | 07:41:38 | 12:29:54 | 17:18:10 | 9h 36m 32s |
| 2026-Jan-03, Saturday | 07:41:43 | 12:30:22 | 17:19:00 | 9h 37m 17s |
| 2026-Jan-04, Sunday | 07:41:46 | 12:30:49 | 17:19:52 | 9h 38m 6s |
| 2026-Jan-05, Monday | 07:41:47 | 12:31:16 | 17:20:44 | 9h 38m 57s |
| 2026-Jan-06, Tuesday | 07:41:46 | 12:31:42 | 17:21:38 | 9h 39m 52s |
| 2026-Jan-07, Wednesday | 07:41:42 | 12:32:08 | 17:22:33 | 9h 40m 51s |
| 2026-Jan-08, Thursday | 07:41:37 | 12:32:33 | 17:23:29 | 9h 41m 52s |
| 2026-Jan-09, Friday | 07:41:29 | 12:32:58 | 17:24:26 | 9h 42m 57s |
| 2026-Jan-10, Saturday | 07:41:20 | 12:33:22 | 17:25:24 | 9h 44m 4s |
| 2026-Jan-11, Sunday | 07:41:08 | 12:33:46 | 17:26:23 | 9h 45m 15s |
| 2026-Jan-12, Monday | 07:40:55 | 12:34:09 | 17:27:23 | 9h 46m 28s |
| 2026-Jan-13, Tuesday | 07:40:39 | 12:34:31 | 17:28:23 | 9h 47m 44s |
| 2026-Jan-14, Wednesday | 07:40:21 | 12:34:53 | 17:29:25 | 9h 49m 4s |
| 2026-Jan-15, Thursday | 07:40:01 | 12:35:14 | 17:30:27 | 9h 50m 26s |
| 2026-Jan-16, Friday | 07:39:40 | 12:35:35 | 17:31:30 | 9h 51m 50s |
| 2026-Jan-17, Saturday | 07:39:16 | 12:35:54 | 17:32:33 | 9h 53m 17s |
| 2026-Jan-18, Sunday | 07:38:50 | 12:36:13 | 17:33:37 | 9h 54m 47s |
| 2026-Jan-19, Monday | 07:38:22 | 12:36:32 | 17:34:41 | 9h 56m 19s |
| 2026-Jan-20, Tuesday | 07:37:52 | 12:36:49 | 17:35:46 | 9h 57m 54s |
| 2026-Jan-21, Wednesday | 07:37:21 | 12:37:06 | 17:36:51 | 9h 59m 30s |
| 2026-Jan-22, Thursday | 07:36:47 | 12:37:22 | 17:37:57 | 10h 1m 10s |
| 2026-Jan-23, Friday | 07:36:11 | 12:37:37 | 17:39:03 | 10h 2m 52s |
| 2026-Jan-24, Saturday | 07:35:34 | 12:37:52 | 17:40:10 | 10h 4m 36s |
| 2026-Jan-25, Sunday | 07:34:55 | 12:38:06 | 17:41:16 | 10h 6m 21s |
| 2026-Jan-26, Monday | 07:34:14 | 12:38:18 | 17:42:23 | 10h 8m 9s |
| 2026-Jan-27, Tuesday | 07:33:31 | 12:38:31 | 17:43:30 | 10h 9m 59s |
| 2026-Jan-28, Wednesday | 07:32:46 | 12:38:42 | 17:44:37 | 10h 11m 51s |
| 2026-Jan-29, Thursday | 07:32:00 | 12:38:52 | 17:45:44 | 10h 13m 44s |
| 2026-Jan-30, Friday | 07:31:12 | 12:39:02 | 17:46:52 | 10h 15m 40s |
| 2026-Jan-31, Saturday | 07:30:23 | 12:39:11 | 17:47:59 | 10h 17m 36s |
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