Weather Chelmsford tomorrow

sunrise 7:13 am
sunset 4:34 pm

HOURLY

Weather forecast Chelmsford Jan. 12, 2026

During the day morning clear, later morning cloudy, in the afternoon initially cloudy, later clear. The highest temperature 37 °F.

Interactive map weather Massachusetts, USA

GPS: 42.5998; -71.3673

altitude: 288 ft
local time:

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Weather forecast Chelmsford, Massachusetts, USA extended forecast

Time			Precip.	Wind	Pressure	Humidity	Dew	total	Fog	Low	Middle	High
Monday 01/12/2026
1 AM	clear	34 °F 27 °F	0.0 in	14 fps 9 mph west-southwest	29.9 in	59 %	23 °F	4 %	0%	4%	0%	0%
7 AM	cloudy	30 °F 23 °F	0.0 in	14 fps 9 mph west	30.0 in	65 %	21 °F	60 %	0%	60%	0%	0%
1 PM	clear	37 °F 30 °F	0.0 in	14 fps 10 mph west	30.1 in	48 %	21 °F	0 %	0%	0%	0%	0%

Chelmsford, Massachusetts, USA - information

State: Massachusetts, USA

GPS coordinates: 42.5998; -71.3673

Time zone: America / New York time difference in hours with time in NY is -6 hours

Population: 33 925
Altitude: 288 ft
The administrative part:

Massachusetts, Boston
Middlesex County, Lowell

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Weather Chelmsford, Massachusetts, USA. Weather forecast Chelmsford.

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Data source

Weather forecast for Chelmsford is supplied by MET Norway Norwegian Meteorological Institute and the NRK.

Feels like

To calculate the perceived temperature, we use the Australian Apparent Temperature (AAT) model, which is designed for year-round calculations and takes air humidity into account in addition to temperature and wind speed.

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Astronomical information Chelmsford

data are always in the local time

Sun and light

Jan. 12, 2026

Sunrise:	Sunset:
7:13 am	4:34 pm
Noon:	Length of day:
11:53 am	09:20
Start of civil twilight*:	End of civil twilight*:
6:41 am	5:06 pm
Start of nautical twilight*:	End of nautical twilight*:
6:07 am	5:40 pm
Start of astronomical twilight*:	End of astronomical twilight*:
5:33 am	6:14 pm
* What is Twilight?

Moon and moon phases

Moonrise:	Moonset:
01/12/2026 1:56 am	01/12/2026 11:38 am
Next new moon:	Next full moon:
01/18/2026	02/01/2026