Hourly Weather Forecast - Merrimack, NH

9 AM
26°F
0%
3mph
NNW
Mostly Sunny
Humidity
79%
Feels like
26°F
Dew Point
21°F
10 AM
29°F
0%
3mph
NNW
Mostly Sunny
Humidity
72%
Feels like
29°F
Dew Point
22°F
11 AM
32°F
0%
3mph
NW
Partly Cloudy
Humidity
67%
Feels like
32°F
Dew Point
22°F
12 PM
33°F
0%
2mph
WNW
Partly Cloudy
Humidity
64%
Feels like
33°F
Dew Point
22°F
1 PM
33°F
0%
2mph
W
Mostly Cloudy
Humidity
64%
Feels like
33°F
Dew Point
23°F
2 PM
33°F
0%
3mph
SSW
Mostly Cloudy
Humidity
67%
Feels like
33°F
Dew Point
23°F
3 PM
32°F
0%
3mph
SSE
Cloudy
Humidity
72%
Feels like
29°F
Dew Point
24°F
4 PM
31°F
0%
4mph
SE
Mostly Cloudy
Humidity
77%
Feels like
26°F
Dew Point
24°F
4:11 PM
5 PM
29°F
0%
4mph
SE
Mostly Cloudy
Humidity
82%
Feels like
25°F
Dew Point
25°F
6 PM
29°F
0%
3mph
SSE
Cloudy
Humidity
83%
Feels like
26°F
Dew Point
25°F
7 PM
30°F
10%
3mph
S
Cloudy
Humidity
83%
Feels like
26°F
Dew Point
25°F
8 PM
30°F
0%
4mph
S
Mostly Cloudy
Humidity
84%
Feels like
27°F
Dew Point
26°F
9 PM
30°F
0%
4mph
SSW
Mostly Cloudy
Humidity
86%
Feels like
26°F
Dew Point
27°F
10 PM
30°F
0%
5mph
SSW
Partly Cloudy
Humidity
86%
Feels like
25°F
Dew Point
26°F
11 PM
29°F
0%
6mph
SW
Mostly Clear
Humidity
86%
Feels like
23°F
Dew Point
26°F

Snow Totals Through Tonight

Snow Impacts Great Lakes to New England

A low pressure system spurs a swath of snow from Wisconsin to New England today.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Image courtesy of PeakPX.

Top 10 Winter Energy Saving Tips

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide