What time is sunset in Chelmsford today?

Sunset in Chelmsford is at 6:16 PM local time (America/New_York) on 2026-10-07.

What phase is the Moon tonight in Chelmsford?

The Moon is a Waning Crescent and about 9% illuminated.

Astronomical twilight ends at 7:49 PM local time, so the sky is fully dark from then until 5:16 AM.

Moonrise in Chelmsford is at 3:21 AM and moonset is at 4:49 PM local time.

The aurora is possible from Chelmsford if the sky is dark and clear; planetary Kp is 2.7.

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Kp2.7

Solar wind346 km/s

X-rayB9.5

StormG0 (Quiet)

Source: NOAA SWPC

2026-10-07 · times in America/New_York · 42.60°N, 71.37°W

Event	Time
Sunrise	6:49 AM
Sunset	6:16 PM
Day length	11 h 27 min
End of civil twilight	6:44 PM
End of nautical twilight	7:17 PM
End of astronomical twilight	7:49 PM
Night length (sunset to sunrise)	12 h 34 min
Fully dark sky tonight	9 h 27 min
Astronomical twilight starts (morning)	5:16 AM

Moonrise	3:21 AM
Moonset	4:49 PM
Illumination	9.2%
Phase	Waning Crescent
Sublunar point (Moon overhead)	7.21°N, 146.01°W
Sublunar point ground speed	1,603 km/h

Moon values are for the moment this page was generated (19:20 UTC). A moonrise or moonset can be missing on a given date.

Planet	Rise	Set	Meridian	Visibility
Mercury (mag -0.1)	9:04 AM	7:01 PM	2:03 PM	Not visible tonight: below the horizon (or too low) while the sky is dark.
Venus (mag -4.6)	9:13 AM	6:31 PM	1:52 PM	Not visible tonight: below the horizon (or too low) while the sky is dark.
Mars (mag 1.1)	12:51 AM	3:34 PM	8:13 AM	Visible about 5 h after dark, highest 57° toward the SE.
Jupiter (mag -1.9)	2:13 AM	4:13 PM	9:13 AM	Visible about 3.8 h after dark, highest 43° toward the E.
Saturn (mag 0.2)	6:14 PM	6:36 AM	12:27 AM	Visible about 11.5 h after dark, highest 49° toward the S.

Aurora possible

Chelmsford is far enough from the equator for aurora. Planetary Kp is 2.7. Seeing it still needs a dark, clear sky.

NOAA SWPC OVATION model. Full aurora forecast