Merrimack County, NH Weather Forecast
County weather hub
Sunny
Compare major city weather across Merrimack County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 97. West wind 5 to 10 mph, with gusts as high as 25 mph.
County Weather Overview
This county weather page brings together forecast coverage for Merrimack County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 10 of 10 mapped cities in Merrimack County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 8:03 AM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrimack County
Tuesday looks like the warmest upcoming period in Merrimack County at 97 degrees F.
Friday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 10 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 8:03 AM EDT
- Coverage
- 5 days
- Time zone
- America/New_York
- Forecast office
- GYX
- Radar station
- KGYX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 74.
Mostly sunny, with a high near 94.
Partly cloudy, with a low around 63.
Sunny, with a high near 88.
Mostly clear, with a low around 60.
Sunny, with a high near 84.
Mostly clear, with a low around 58.
A chance of rain showers after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of rain showers before 8pm, then a chance of showers and thunderstorms between 8pm and 9pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
97°F |
5 to 10 mph
W
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
74°F |
10 mph
W
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
94°F |
10 mph
W
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
63°F |
0 to 10 mph
W
|
|
Thursday
Jul 16
|
Sunny
|
88°F |
0 to 10 mph
W
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
60°F |
0 to 5 mph
NW
|
|
Friday
Jul 17
|
Sunny
|
84°F |
0 to 10 mph
NW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
58°F |
0 to 5 mph
NW
|
|
Saturday
Jul 18
|
Mostly Sunny then Chance Rain Showers
|
85°F |
0 to 5 mph
NW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
59°F |
0 to 5 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Merrimack County.
Coverage
Forecast coverage currently spans 10 of 10 mapped cities in Merrimack County.
Largest mapped city population in this region: 43,924.
