Hourly Weather Forecast - Chelmsford, MA

3 AM
35°F
0%
9mph
SSW
Mostly Cloudy
Humidity
73%
Feels like
28°F
Dew Point
28°F
4 AM
36°F
0%
9mph
SSW
Partly Cloudy
Humidity
72%
Feels like
29°F
Dew Point
28°F
5 AM
37°F
0%
8mph
SSW
Partly Cloudy
Humidity
73%
Feels like
31°F
Dew Point
29°F
6 AM
37°F
0%
7mph
SW
Mostly Clear
Humidity
75%
Feels like
32°F
Dew Point
30°F
7 AM
38°F
0%
6mph
SW
Mostly Clear
Humidity
71%
Feels like
34°F
Dew Point
30°F
7:11 AM
8 AM
40°F
0%
6mph
SW
Sunny
Humidity
68%
Feels like
36°F
Dew Point
30°F
9 AM
42°F
0%
6mph
WSW
Sunny
Humidity
63%
Feels like
38°F
Dew Point
30°F
10 AM
43°F
0%
7mph
WSW
Sunny
Humidity
58%
Feels like
38°F
Dew Point
29°F
11 AM
43°F
0%
8mph
W
Mostly Sunny
Humidity
51%
Feels like
38°F
Dew Point
26°F
12 PM
42°F
0%
9mph
W
Mostly Sunny
Humidity
47%
Feels like
36°F
Dew Point
23°F
1 PM
40°F
0%
10mph
WNW
Mostly Sunny
Humidity
44%
Feels like
34°F
Dew Point
20°F
2 PM
38°F
0%
10mph
WNW
Sunny
Humidity
44%
Feels like
32°F
Dew Point
19°F
3 PM
36°F
0%
9mph
WNW
Mostly Sunny
Humidity
40%
Feels like
29°F
Dew Point
14°F
4 PM
33°F
0%
8mph
WNW
Partly Cloudy
Humidity
43%
Feels like
26°F
Dew Point
13°F
4:15 PM
5 PM
32°F
0%
8mph
WNW
Mostly Clear
Humidity
45%
Feels like
25°F
Dew Point
13°F
6 PM
31°F
0%
7mph
WNW
Partly Cloudy
Humidity
48%
Feels like
24°F
Dew Point
14°F
7 PM
30°F
0%
6mph
WNW
Partly Cloudy
Humidity
52%
Feels like
24°F
Dew Point
14°F
8 PM
29°F
0%
6mph
WNW
Partly Cloudy
Humidity
52%
Feels like
23°F
Dew Point
14°F
9 PM
29°F
0%
6mph
WNW
Partly Cloudy
Humidity
51%
Feels like
23°F
Dew Point
13°F
10 PM
29°F
0%
6mph
WNW
Partly Cloudy
Humidity
52%
Feels like
23°F
Dew Point
13°F
11 PM
28°F
0%
6mph
WNW
Partly Cloudy
Humidity
51%
Feels like
22°F
Dew Point
12°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California through 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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide