Hourly Weather Forecast - Chelmsford, MA

12 AM
30°F
20%
0mph
NW
Cloudy
Humidity
79%
Feels like
30°F
Dew Point
24°F
1 AM
30°F
30%
0mph
NW
30% Chance of Flurries
Humidity
79%
Feels like
30°F
Dew Point
24°F
2 AM
30°F
30%
0mph
NW
30% Chance of Snow
Humidity
78%
Feels like
30°F
Dew Point
24°F
3 AM
30°F
30%
0mph
NW
30% Chance of Snow
Humidity
77%
Feels like
30°F
Dew Point
24°F
4 AM
30°F
30%
0mph
WNW
30% Chance of Snow
Humidity
78%
Feels like
30°F
Dew Point
24°F
5 AM
30°F
30%
1mph
W
30% Chance of Flurries
Humidity
79%
Feels like
30°F
Dew Point
25°F
6 AM
31°F
20%
1mph
WSW
Cloudy
Humidity
80%
Feels like
31°F
Dew Point
25°F
7 AM
32°F
30%
1mph
SW
30% Chance Freezing Rain
Humidity
81%
Feels like
32°F
Dew Point
27°F
7:14 AM
8 AM
33°F
40%
0mph
SW
40% Chance of Light Rain
Humidity
78%
Feels like
33°F
Dew Point
27°F
9 AM
34°F
50%
0mph
SW
50% Chance of Light Rain
Humidity
78%
Feels like
34°F
Dew Point
28°F
10 AM
35°F
50%
1mph
SW
50% Chance of Light Rain
Humidity
77%
Feels like
35°F
Dew Point
28°F
11 AM
35°F
50%
1mph
WSW
50% Chance of Light Rain
Humidity
78%
Feels like
35°F
Dew Point
29°F
12 PM
36°F
50%
2mph
W
50% Chance of Light Rain
Humidity
79%
Feels like
36°F
Dew Point
30°F
1 PM
37°F
40%
2mph
W
40% Chance of Light Rain
Humidity
81%
Feels like
37°F
Dew Point
31°F
2 PM
37°F
30%
2mph
WNW
30% Chance of Light Rain
Humidity
83%
Feels like
37°F
Dew Point
32°F
3 PM
37°F
30%
2mph
WNW
30% Chance of Light Rain
Humidity
83%
Feels like
37°F
Dew Point
32°F
4 PM
36°F
20%
2mph
NW
Cloudy
Humidity
85%
Feels like
36°F
Dew Point
32°F
4:17 PM
5 PM
35°F
20%
3mph
NW
Cloudy
Humidity
86%
Feels like
32°F
Dew Point
31°F
6 PM
34°F
20%
4mph
NW
Cloudy
Humidity
85%
Feels like
30°F
Dew Point
30°F
7 PM
33°F
20%
5mph
NW
Cloudy
Humidity
80%
Feels like
29°F
Dew Point
28°F
8 PM
32°F
20%
5mph
NW
Cloudy
Humidity
80%
Feels like
27°F
Dew Point
27°F
9 PM
31°F
20%
5mph
NNW
Cloudy
Humidity
79%
Feels like
26°F
Dew Point
26°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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