Chelmsford, MA Weather Forecast
Middlesex County, Massachusetts
Live radar, warnings and storm tracking for Chelmsford, with free alerts the moment it counts.
The next few hours
Dry for the moment, with rain moving in this morning
It is 40°, but the wind is taking it down to 38° on exposed skin. The sky is overcast. The air is close to calm.
The wind turns to the east-northeast around 10 AM. The first rain arrives between 10 AM and 11 AM, with the best chance of it around 4 AM. That leaves a usable window outdoors until about 10 AM, and it closes quickly after that.
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
A long wet stretch ahead
Wet weather moves in around 10 AM. Total accumulation over the window comes to about 0.44 in.
The overnight low settles near 40°. Tomorrow reaches 49°, 8° warmer than today. It also gets muggier, so tomorrow will feel warmer than the number on its own suggests.
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
28–58°F across the weekThe week runs between 28° and 51°, with Tuesday the warmest day of it. There is no real trend across it: one day looks much like the next. Friday is the wettest day, peaking near 89%. 5 of the 7 days stay dry.
Free alerts for Chelmsford
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Chelmsford, MA at a glance
Chelmsford is home to about 36,180 people in Middlesex County, across 22 square miles. It ranks 47th by population of 283 places in Massachusetts with a forecast here. The nearest neighbour with its own forecast is Westford, 4 miles away.
- County
- Middlesex County
- Population
- 36,180 2023 est.
- Land area
- 22 sq mi
- People per sq mi
- 1,616
- Forecast point
- 42.5971°N, 71.3697°W
How well can the network see Chelmsford?
The nearest Doppler radar is KBOX (Boston, MA), to the SSE. Its lowest scan passes about 3,200 ft above Chelmsford. Close enough to see rotation in the low part of a storm, where tornadoes form.
The closest weather station is KBED (Bedford/Hanscom Fld). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Chelmsford
- Westford, MA4 mi
- Lowell, MA4 mi
- Carlisle, MA4 mi
- Tyngsborough, MA6 mi
- Billerica, MA6 mi
- Dracut, MA7 mi
- Tewksbury, MA7 mi
- Littleton, MA7 mi
Elsewhere in Massachusetts
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