Acton, Massachusetts
Sunrise and sunset in Acton, Massachusetts
Today’s sunrise, sunset and twilight in Acton, Massachusetts, in local time. At 42.5° N, the day lasts from 9 h 04 min at the winter solstice to 15 h 18 min at the summer solstice.
Today · worked out at
Wednesday, October 21: sunrise at 07:05, sunset at 17:54.
Day length 10 h 48 min, 2 min 43 s shorter than yesterday.
Solar noon at 12:30, with the Sun 37° above the horizon.
Times are Acton, Massachusetts time (EDT).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 05:31 | 19:27 |
| Nautical twilight | 06:04 | 18:55 |
| Civil twilight | 06:37 | 18:22 |
| Sunrise and sunset | 07:05 | 17:54 |
| Golden hour | 07:05–07:44 | 17:15–17:54 |
Each twilight begins at the morning time and ends at the evening one.
The year in Acton, Massachusetts
- Longest day: June 21, 15 h 18 min, from sunrise at 05:08 to sunset at 20:26.
- Shortest day: December 21, 9 h 04 min, from sunrise at 07:12 to sunset at 16:15.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 07:09 | 16:45 | 9 h 36 min |
| February 21 | 06:33 | 17:25 | 10 h 52 min |
| March 21 | 06:47 | 18:59 | 12 h 12 min |
| April 21 | 05:55 | 19:34 | 13 h 39 min |
| May 21 | 05:18 | 20:06 | 14 h 49 min |
| June 21 | 05:08 | 20:26 | 15 h 18 min |
| July 21 | 05:27 | 20:16 | 14 h 49 min |
| August 21 | 05:59 | 19:37 | 13 h 39 min |
| September 21 | 06:32 | 18:44 | 12 h 13 min |
| October 21 | 07:05 | 17:54 | 10 h 48 min |
| November 21 | 06:44 | 16:18 | 9 h 34 min |
| December 21 | 07:12 | 16:15 | 9 h 04 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 42.5° N, 71.4° W, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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