Hourly Weather Forecast - Merrimac, MA

12 AM
34°F
0%
5mph
W
Clear
Humidity
75%
Feels like
30°F
Dew Point
27°F
1 AM
33°F
0%
4mph
W
Clear
Humidity
75%
Feels like
29°F
Dew Point
27°F
2 AM
32°F
0%
4mph
W
Clear
Humidity
76%
Feels like
29°F
Dew Point
26°F
3 AM
31°F
0%
3mph
WSW
Clear
Humidity
79%
Feels like
31°F
Dew Point
25°F
4 AM
29°F
0%
3mph
WSW
Clear
Humidity
84%
Feels like
29°F
Dew Point
25°F
5 AM
27°F
0%
2mph
WSW
Clear
Humidity
90%
Feels like
27°F
Dew Point
24°F
6 AM
26°F
0%
2mph
WSW
Hazy
Humidity
94%
Feels like
26°F
Dew Point
24°F
7 AM
26°F
0%
2mph
WSW
Hazy
Humidity
94%
Feels like
26°F
Dew Point
25°F
7:09 AM
8 AM
29°F
0%
3mph
SW
Sunny
Humidity
89%
Feels like
29°F
Dew Point
26°F
9 AM
32°F
0%
4mph
SW
Sunny
Humidity
82%
Feels like
29°F
Dew Point
27°F
10 AM
36°F
0%
4mph
SSW
Sunny
Humidity
74%
Feels like
32°F
Dew Point
28°F
11 AM
38°F
0%
5mph
SSW
Sunny
Humidity
68%
Feels like
35°F
Dew Point
29°F
12 PM
40°F
0%
5mph
S
Sunny
Humidity
64%
Feels like
37°F
Dew Point
29°F
1 PM
41°F
10%
6mph
S
Sunny
Humidity
64%
Feels like
37°F
Dew Point
30°F
2 PM
41°F
10%
6mph
S
Mostly Sunny
Humidity
67%
Feels like
37°F
Dew Point
31°F
3 PM
40°F
10%
6mph
S
Partly Cloudy
Humidity
73%
Feels like
35°F
Dew Point
32°F
4 PM
38°F
10%
6mph
S
Partly Cloudy
Humidity
80%
Feels like
33°F
Dew Point
32°F
4:11 PM
5 PM
38°F
10%
6mph
S
Mostly Cloudy
Humidity
84%
Feels like
33°F
Dew Point
33°F
6 PM
38°F
0%
6mph
S
Mostly Cloudy
Humidity
87%
Feels like
33°F
Dew Point
34°F
7 PM
39°F
0%
6mph
S
Mostly Cloudy
Humidity
87%
Feels like
34°F
Dew Point
35°F
8 PM
40°F
0%
7mph
S
Mostly Cloudy
Humidity
90%
Feels like
35°F
Dew Point
37°F
9 PM
41°F
10%
7mph
S
Cloudy
Humidity
90%
Feels like
36°F
Dew Point
38°F
10 PM
42°F
10%
8mph
S
Cloudy
Humidity
92%
Feels like
38°F
Dew Point
40°F
11 PM
44°F
20%
8mph
S
Cloudy
Humidity
93%
Feels like
39°F
Dew Point
42°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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