Hourly Weather Forecast - Chelmsford, MA

12 AM
32°F
20%
1mph
SSW
Cloudy
Humidity
83%
Feels like
32°F
Dew Point
27°F
1 AM
31°F
30%
1mph
SSW
30% Chance of Flurries
Humidity
85%
Feels like
31°F
Dew Point
28°F
2 AM
31°F
30%
1mph
SSW
30% Chance of Snow
Humidity
86%
Feels like
31°F
Dew Point
28°F
3 AM
31°F
30%
2mph
SW
30% Chance of Snow
Humidity
88%
Feels like
31°F
Dew Point
28°F
4 AM
31°F
30%
2mph
WSW
30% Chance of Flurries
Humidity
88%
Feels like
31°F
Dew Point
28°F
5 AM
32°F
30%
2mph
WSW
30% Chance Freezing Rain
Humidity
88%
Feels like
32°F
Dew Point
29°F
6 AM
32°F
20%
2mph
WSW
Cloudy
Humidity
87%
Feels like
32°F
Dew Point
29°F
7 AM
33°F
30%
2mph
WSW
30% Chance of Light Rain
Humidity
85%
Feels like
33°F
Dew Point
29°F
7:14 AM
8 AM
34°F
40%
2mph
WSW
40% Chance of Light Rain
Humidity
80%
Feels like
34°F
Dew Point
28°F
9 AM
36°F
40%
1mph
WSW
40% Chance of Light Rain
Humidity
76%
Feels like
36°F
Dew Point
29°F
10 AM
38°F
40%
1mph
WSW
40% Chance of Light Rain
Humidity
72%
Feels like
38°F
Dew Point
29°F
11 AM
39°F
40%
1mph
WSW
40% Chance of Light Rain
Humidity
71%
Feels like
39°F
Dew Point
30°F
12 PM
40°F
40%
1mph
WSW
40% Chance of Light Rain
Humidity
71%
Feels like
40°F
Dew Point
31°F
1 PM
40°F
30%
2mph
WSW
30% Chance of Light Rain
Humidity
72%
Feels like
40°F
Dew Point
32°F
2 PM
40°F
30%
2mph
WSW
30% Chance of Light Rain
Humidity
73%
Feels like
40°F
Dew Point
33°F
3 PM
40°F
20%
2mph
W
Cloudy
Humidity
75%
Feels like
40°F
Dew Point
33°F
4 PM
39°F
20%
2mph
W
Cloudy
Humidity
78%
Feels like
39°F
Dew Point
33°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

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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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