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 evening
It is 42°, but the wind is taking it down to 36° on exposed skin. The sky is scattered rain.
The first rain arrives between 6 PM and 7 PM, with the best chance of it around midnight.
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Wet through the window, then cooler and clearing
The wet part of the window runs from about 6 PM to 10 AM, 16 hours of it, with the highest chance near midnight. Total accumulation over the window comes to about 0.46 in.
It tapers off after 10 AM. The overnight low settles near 34°. Tomorrow tops out near 43°. The humidity goes with it: tomorrow is the more comfortable half of this window, and the safer one for anything outdoors.
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
27–60°F across the weekThe week runs between 27° and 59°, with Wednesday the warmest day of it. There is no real trend across it: one day looks much like the next. Tomorrow is the wettest day, peaking near 94%. 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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