Merrimack, NH Weather Forecast
Local 7-day forecast
Light Rain
Track current conditions, temperature changes, wind, and the full daily outlook for Merrimack, NH in one place.
Rain and areas of fog. Cloudy, with a high near 60. East wind around 5 mph. Chance of precipitation is 80%.
Local Weather Overview
This forecast page for Merrimack, NH is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 12, 2026 3:58 AM EDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Merrimack, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 3:58 AM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrimack
Wednesday looks like the warmest upcoming period in Merrimack at 69 degrees F.
Saturday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 3:58 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- GYX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain before 8pm, then a slight chance of thunderstorms and a slight chance of rain between 8pm and 9pm, then rain likely and a slight chance of thunderstorms between 9pm and 5am. Mostly cloudy, with a low around 52. South wind around 5 mph. Chance of precipitation is 80%.
Partly sunny, with a high near 69.
Partly cloudy, with a low around 48.
Mostly sunny, with a high near 60.
A slight chance of rain showers after 5am. Partly cloudy, with a low around 39.
Rain showers likely. Partly sunny, with a high near 59. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
A chance of rain showers before 10am. Partly sunny, with a high near 52. Chance of precipitation is 40%.
Mostly cloudy, with a low around 32.
Mostly sunny, with a high near 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Light Rain
|
60°F |
5 mph
E
|
|
Tuesday Night
Oct 13
|
Slight Chance T-storms then Light Rain Likely
|
52°F |
5 mph
S
|
|
Wednesday
Oct 14
|
Partly Sunny
|
69°F |
5 mph
W
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
48°F |
5 mph
NW
|
|
Thursday
Oct 15
|
Mostly Sunny
|
60°F |
10 mph
NW
|
|
Thursday Night
Oct 15
|
Partly Cloudy then Slight Chance Rain Showers
|
39°F |
0 to 5 mph
NW
|
|
Friday
Oct 16
|
Rain Showers Likely
|
59°F |
0 to 10 mph
SE
|
|
Friday Night
Oct 16
|
Rain Showers Likely
|
41°F |
5 to 15 mph
W
|
|
Saturday
Oct 17
|
Chance Rain Showers then Partly Sunny
|
52°F |
15 to 20 mph
NW
|
|
Saturday Night
Oct 17
|
Mostly Cloudy
|
32°F |
10 to 15 mph
NW
|
|
Sunday
Oct 18
|
Mostly Sunny
|
49°F |
10 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Merrimack.
