Merrimack County, NH Weather Forecast
County weather hub
Light Rain
Compare major city weather across Merrimack County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain before 2pm, then a slight chance of rain showers between 2pm and 5pm. Mostly cloudy, with a high near 56. Northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
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 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 6:23 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.
Saturday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph NE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 28, 2026 6:23 PM 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
Partly cloudy, with a low around 39.
Mostly sunny, with a high near 70.
A chance of rain showers after 8pm. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.
Rain showers likely before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
A chance of rain showers. Partly sunny, with a high near 64. Chance of precipitation is 50%.
A chance of rain showers before 5am. Mostly cloudy, with a low around 44. Chance of precipitation is 50%.
A chance of rain showers after 8am. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 47.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Light Rain
|
56°F |
5 to 15 mph
NE
|
|
Saturday Night
May 30
|
Partly Cloudy
|
39°F |
0 to 5 mph
N
|
|
Sunday
May 31
|
Mostly Sunny
|
70°F |
0 to 5 mph
NW
|
|
Sunday Night
May 31
|
Chance Rain Showers
|
46°F |
0 to 5 mph
W
|
|
Monday
Jun 1
|
Rain Showers Likely
|
66°F |
0 to 5 mph
NW
|
|
Monday Night
Jun 1
|
Showers And Thunderstorms Likely
|
43°F |
0 to 5 mph
N
|
|
Tuesday
Jun 2
|
Chance Rain Showers
|
64°F |
0 to 5 mph
N
|
|
Tuesday Night
Jun 2
|
Chance Rain Showers
|
44°F |
0 to 5 mph
NE
|
|
Wednesday
Jun 3
|
Chance Rain Showers
|
68°F |
0 to 5 mph
N
|
|
Wednesday Night
Jun 3
|
Slight Chance Rain Showers then Partly Cloudy
|
47°F |
0 to 5 mph
NW
|
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.
