Sunrise and Sunset times in Chelmsford, United States 
Today:
 Sunrise: 06:59:11
|
 Sunset: 16:12:27
|
Day Length: 9h 13m 16s
Time zone: America/New_York, UTC -5 h.
Latitude: 42.6, Longitude: -71.3631
Chelmsford
Massachusetts, United States 
35 067 people
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2025-Dec-01, Monday | 06:56:06 | 11:34:38 | 16:13:10 | 9h 17m 4s |
| 2025-Dec-02, Tuesday | 06:57:09 | 11:35:01 | 16:12:53 | 9h 15m 44s |
| 2025-Dec-03, Wednesday | 06:58:10 | 11:35:25 | 16:12:39 | 9h 14m 29s |
| 2025-Dec-04, Thursday | 06:59:11 | 11:35:49 | 16:12:27 | 9h 13m 16s |
| 2025-Dec-05, Friday | 07:00:10 | 11:36:14 | 16:12:17 | 9h 12m 7s |
| 2025-Dec-06, Saturday | 07:01:08 | 11:36:39 | 16:12:10 | 9h 11m 2s |
| 2025-Dec-07, Sunday | 07:02:04 | 11:37:05 | 16:12:06 | 9h 10m 2s |
| 2025-Dec-08, Monday | 07:02:59 | 11:37:31 | 16:12:03 | 9h 9m 4s |
| 2025-Dec-09, Tuesday | 07:03:52 | 11:37:58 | 16:12:04 | 9h 8m 12s |
| 2025-Dec-10, Wednesday | 07:04:44 | 11:38:25 | 16:12:06 | 9h 7m 22s |
| 2025-Dec-11, Thursday | 07:05:34 | 11:38:53 | 16:12:12 | 9h 6m 38s |
| 2025-Dec-12, Friday | 07:06:23 | 11:39:21 | 16:12:19 | 9h 5m 56s |
| 2025-Dec-13, Saturday | 07:07:09 | 11:39:49 | 16:12:29 | 9h 5m 20s |
| 2025-Dec-14, Sunday | 07:07:54 | 11:40:18 | 16:12:42 | 9h 4m 48s |
| 2025-Dec-15, Monday | 07:08:37 | 11:40:47 | 16:12:57 | 9h 4m 20s |
| 2025-Dec-16, Tuesday | 07:09:18 | 11:41:16 | 16:13:14 | 9h 3m 56s |
| 2025-Dec-17, Wednesday | 07:09:57 | 11:41:45 | 16:13:34 | 9h 3m 37s |
| 2025-Dec-18, Thursday | 07:10:34 | 11:42:15 | 16:13:56 | 9h 3m 22s |
| 2025-Dec-19, Friday | 07:11:09 | 11:42:44 | 16:14:20 | 9h 3m 11s |
| 2025-Dec-20, Saturday | 07:11:42 | 11:43:14 | 16:14:46 | 9h 3m 4s |
| 2025-Dec-21, Sunday | 07:12:12 | 11:43:44 | 16:15:15 | 9h 3m 3s |
| 2025-Dec-22, Monday | 07:12:41 | 11:44:14 | 16:15:46 | 9h 3m 5s |
| 2025-Dec-23, Tuesday | 07:13:07 | 11:44:44 | 16:16:20 | 9h 3m 13s |
| 2025-Dec-24, Wednesday | 07:13:31 | 11:45:13 | 16:16:55 | 9h 3m 24s |
| 2025-Dec-25, Thursday | 07:13:53 | 11:45:43 | 16:17:33 | 9h 3m 40s |
| 2025-Dec-26, Friday | 07:14:13 | 11:46:13 | 16:18:12 | 9h 3m 59s |
| 2025-Dec-27, Saturday | 07:14:30 | 11:46:42 | 16:18:54 | 9h 4m 24s |
| 2025-Dec-28, Sunday | 07:14:45 | 11:47:12 | 16:19:38 | 9h 4m 53s |
| 2025-Dec-29, Monday | 07:14:58 | 11:47:41 | 16:20:24 | 9h 5m 26s |
| 2025-Dec-30, Tuesday | 07:15:08 | 11:48:10 | 16:21:11 | 9h 6m 3s |
| 2025-Dec-31, Wednesday | 07:15:16 | 11:48:38 | 16:22:00 | 9h 6m 44s |
Day length in Chelmsford during the year on the chart:
Chelmsford on United States map:
Locations in the same time zone America/New_York
New York (New York), Miami (Florida), Philadelphia (Pennsylvania), Washington (District of Columbia), Atlanta (Georgia), Boston (Massachusetts), Tampa (Florida), Brooklyn (New York), Queens (New York), Baltimore (Maryland), Orlando (Florida), Cleveland (Ohio), Pittsburgh (Pennsylvania), Cincinnati (Ohio), Manhattan (New York), Columbus (Ohio), Virginia Beach (Virginia), Charlotte (North Carolina), Bronx (New York), Providence (Rhode Island), Jacksonville (Florida), Richmond (Virginia), Raleigh (North Carolina), Louisville (Kentucky), Bridgeport (Connecticut), Buffalo (New York), Hartford (Connecticut), Dayton (Ohio), Rochester (New York), Sarasota (Florida)
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