Merrimack County, NH Weather Forecast
County weather hub
Chance Rain Showers
Compare major city weather across Merrimack County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers after 10am. Partly sunny, with a high near 70. Chance of precipitation is 40%.
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
- May 10 to May 13, 2026
- Latest sync
- May 7, 2026 1:33 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrimack County
Sunday looks like the warmest upcoming period in Merrimack County at 70 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Sunday at about 0 to 10 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- May 7, 2026 1:33 PM EDT
- Coverage
- 4 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
Rain showers likely. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.
Rain showers likely. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
A chance of rain showers before 11pm. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.
Mostly sunny, with a high near 59.
Partly cloudy, with a low around 39.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 61.
A chance of rain showers. Mostly cloudy, with a low around 41.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 10
|
Chance Rain Showers
|
70°F |
0 to 10 mph
SW
|
|
Sunday Night
May 10
|
Rain Showers Likely
|
43°F |
0 to 5 mph
W
|
|
Monday
May 11
|
Rain Showers Likely
|
58°F |
0 to 5 mph
NW
|
|
Monday Night
May 11
|
Chance Rain Showers then Mostly Cloudy
|
40°F |
0 to 5 mph
NW
|
|
Tuesday
May 12
|
Mostly Sunny
|
59°F |
5 to 10 mph
NW
|
|
Tuesday Night
May 12
|
Partly Cloudy
|
39°F |
0 to 5 mph
W
|
|
Wednesday
May 13
|
Mostly Sunny then Slight Chance Rain Showers
|
61°F |
0 to 5 mph
W
|
|
Wednesday Night
May 13
|
Chance Rain Showers
|
41°F |
0 to 5 mph
S
|
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.
