Hourly Weather Forecast - Merrimac, MA

12 AM
19°F
0%
4mph
WSW
Partly Cloudy
Humidity
71%
Feels like
13°F
Dew Point
11°F
1 AM
19°F
0%
4mph
WSW
Mostly Cloudy
Humidity
75%
Feels like
13°F
Dew Point
12°F
2 AM
19°F
0%
4mph
WSW
Mostly Cloudy
Humidity
78%
Feels like
12°F
Dew Point
13°F
3 AM
18°F
0%
5mph
WSW
Cloudy
Humidity
82%
Feels like
11°F
Dew Point
13°F
4 AM
17°F
0%
5mph
WSW
Cloudy
Humidity
85%
Feels like
10°F
Dew Point
14°F
5 AM
17°F
0%
5mph
WSW
Mostly Cloudy
Humidity
88%
Feels like
10°F
Dew Point
14°F
6 AM
17°F
0%
4mph
WSW
Partly Cloudy
Humidity
89%
Feels like
11°F
Dew Point
15°F
7 AM
19°F
0%
4mph
WSW
Mostly Clear
Humidity
85%
Feels like
13°F
Dew Point
15°F
7:08 AM
8 AM
21°F
0%
4mph
WSW
Sunny
Humidity
79%
Feels like
15°F
Dew Point
16°F
9 AM
24°F
0%
4mph
W
Sunny
Humidity
73%
Feels like
19°F
Dew Point
17°F
10 AM
27°F
0%
4mph
WSW
Sunny
Humidity
66%
Feels like
21°F
Dew Point
17°F
11 AM
29°F
0%
5mph
WSW
Sunny
Humidity
61%
Feels like
24°F
Dew Point
17°F
12 PM
31°F
0%
5mph
WSW
Sunny
Humidity
58%
Feels like
25°F
Dew Point
18°F
1 PM
31°F
0%
5mph
WSW
Sunny
Humidity
57%
Feels like
26°F
Dew Point
18°F
2 PM
31°F
0%
5mph
SW
Sunny
Humidity
59%
Feels like
25°F
Dew Point
18°F
3 PM
29°F
0%
5mph
SW
Sunny
Humidity
62%
Feels like
24°F
Dew Point
18°F
4 PM
27°F
0%
4mph
SW
Sunny
Humidity
66%
Feels like
22°F
Dew Point
18°F
4:10 PM
5 PM
26°F
0%
4mph
SW
Clear
Humidity
69%
Feels like
21°F
Dew Point
17°F
6 PM
25°F
0%
4mph
SW
Clear
Humidity
71%
Feels like
20°F
Dew Point
17°F
7 PM
25°F
0%
4mph
SW
Clear
Humidity
70%
Feels like
20°F
Dew Point
17°F
8 PM
25°F
0%
4mph
SW
Mostly Clear
Humidity
71%
Feels like
19°F
Dew Point
17°F
9 PM
25°F
0%
5mph
SW
Partly Cloudy
Humidity
71%
Feels like
19°F
Dew Point
17°F
10 PM
25°F
0%
5mph
SSW
Mostly Cloudy
Humidity
72%
Feels like
18°F
Dew Point
17°F
11 PM
25°F
0%
6mph
SSW
Partly Cloudy
Humidity
72%
Feels like
18°F
Dew Point
17°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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