Sunrise and Sunset times in Boulder, United States
Daily sun schedule, day length and annual chart
Select month and year
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2026-Apr-01, Wednesday | 07:07:15 | 13:32:14 | 19:57:13 | 12h 49m 58s |
| 2026-Apr-02, Thursday | 07:05:20 | 13:31:57 | 19:58:33 | 12h 53m 13s |
| 2026-Apr-03, Friday | 07:03:25 | 13:31:39 | 19:59:53 | 12h 56m 28s |
| 2026-Apr-04, Saturday | 07:01:30 | 13:31:22 | 20:01:13 | 12h 59m 43s |
| 2026-Apr-05, Sunday | 06:59:35 | 13:31:04 | 20:02:33 | 13h 2m 58s |
| 2026-Apr-06, Monday | 06:57:41 | 13:30:47 | 20:03:53 | 13h 6m 12s |
| 2026-Apr-07, Tuesday | 06:55:48 | 13:30:31 | 20:05:13 | 13h 9m 25s |
| 2026-Apr-08, Wednesday | 06:53:55 | 13:30:14 | 20:06:33 | 13h 12m 38s |
| 2026-Apr-09, Thursday | 06:52:02 | 13:29:58 | 20:07:53 | 13h 15m 51s |
| 2026-Apr-10, Friday | 06:50:10 | 13:29:42 | 20:09:13 | 13h 19m 3s |
| 2026-Apr-11, Saturday | 06:48:18 | 13:29:26 | 20:10:33 | 13h 22m 15s |
| 2026-Apr-12, Sunday | 06:46:28 | 13:29:10 | 20:11:53 | 13h 25m 25s |
| 2026-Apr-13, Monday | 06:44:37 | 13:28:55 | 20:13:13 | 13h 28m 36s |
| 2026-Apr-14, Tuesday | 06:42:48 | 13:28:40 | 20:14:33 | 13h 31m 45s |
| 2026-Apr-15, Wednesday | 06:40:59 | 13:28:26 | 20:15:53 | 13h 34m 54s |
| 2026-Apr-16, Thursday | 06:39:11 | 13:28:12 | 20:17:13 | 13h 38m 2s |
| 2026-Apr-17, Friday | 06:37:23 | 13:27:58 | 20:18:33 | 13h 41m 10s |
| 2026-Apr-18, Saturday | 06:35:37 | 13:27:45 | 20:19:53 | 13h 44m 16s |
| 2026-Apr-19, Sunday | 06:33:51 | 13:27:32 | 20:21:13 | 13h 47m 22s |
| 2026-Apr-20, Monday | 06:32:06 | 13:27:19 | 20:22:32 | 13h 50m 26s |
| 2026-Apr-21, Tuesday | 06:30:22 | 13:27:07 | 20:23:52 | 13h 53m 30s |
| 2026-Apr-22, Wednesday | 06:28:39 | 13:26:55 | 20:25:12 | 13h 56m 33s |
| 2026-Apr-23, Thursday | 06:26:57 | 13:26:44 | 20:26:32 | 13h 59m 35s |
| 2026-Apr-24, Friday | 06:25:16 | 13:26:34 | 20:27:51 | 14h 2m 35s |
| 2026-Apr-25, Saturday | 06:23:36 | 13:26:23 | 20:29:11 | 14h 5m 35s |
| 2026-Apr-26, Sunday | 06:21:57 | 13:26:14 | 20:30:30 | 14h 8m 33s |
| 2026-Apr-27, Monday | 06:20:19 | 13:26:04 | 20:31:49 | 14h 11m 30s |
| 2026-Apr-28, Tuesday | 06:18:43 | 13:25:56 | 20:33:08 | 14h 14m 25s |
| 2026-Apr-29, Wednesday | 06:17:08 | 13:25:47 | 20:34:27 | 14h 17m 19s |
| 2026-Apr-30, Thursday | 06:15:33 | 13:25:40 | 20:35:46 | 14h 20m 13s |
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