Merrimack County, NH Weather Forecast

County weather hub

70°
F

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.

Sunday, May 10, 2026
Wind: 0 to 10 mph SW
Sunday

A chance of rain showers after 10am. Partly sunny, with a high near 70. Chance of precipitation is 40%.

County weather hub

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
Next High
70°F
Sunday
Next Low
43°F
Sunday Night
Rain Outlook
6
Periods mentioning precipitation
Windiest
0 to 10 mph
Sunday

Daily Outlook

Today
May 10
Chance Rain Showers
70 °F
/ 43°F
Wind 0 to 10 mph
Mon
May 11
Rain Showers Likely
58 °F
/ 40°F
Wind 0 to 5 mph
Tue
May 12
Mostly Sunny
59 °F
/ 39°F
Wind 5 to 10 mph
Wed
May 13
Mostly Sunny then Slight Chance Rain Showers
61 °F
/ 41°F
Wind 0 to 5 mph

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 source

Extended Forecast

Sunday Night
May 10
43°F
Rain Showers Likely
0 to 5 mph W

Rain showers likely. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

Monday
May 11
58°F
Rain Showers Likely
0 to 5 mph NW

Rain showers likely. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.

Monday Night
May 11
40°F
Chance Rain Showers then Mostly Cloudy
0 to 5 mph NW

A chance of rain showers before 11pm. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.

Tuesday
May 12
59°F
Mostly Sunny
5 to 10 mph NW

Mostly sunny, with a high near 59.

Tuesday Night
May 12
39°F
Partly Cloudy
0 to 5 mph W

Partly cloudy, with a low around 39.

Wednesday
May 13
61°F
Mostly Sunny then Slight Chance Rain Showers
0 to 5 mph W

A slight chance of rain showers after 2pm. Mostly sunny, with a high near 61.

Wednesday Night
May 13
41°F
Chance Rain Showers
0 to 5 mph S

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
ConcordNH MerrimackCountyCourthouse 02
ConcordNH MerrimackCountyCourthouse 02 image
Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.