Grantham, NH Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grantham, NH in one place.
Mostly sunny, with a high near 61. West wind around 5 mph.
Local Weather Overview
This forecast page for Grantham, 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 24, 2026 6:47 PM EDT.
The active forecast window currently covers Oct 26 to Oct 30, 2026 for Grantham, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 26 to Oct 30, 2026
- Latest sync
- Oct 24, 2026 6:47 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grantham
Monday looks like the warmest upcoming period in Grantham at 61 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 26 degrees F.
The strongest winds are forecast for Monday Night at about 5 to 10 mph NW.
The forecast from Oct 26 through Oct 30 stays mostly dry.
Forecast Details
- Last updated
- Oct 24, 2026 6:47 PM EDT
- Coverage
- 5 days
- Time zone
- America/New_York
- Forecast office
- GYX
- Radar station
- KCXX
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 33.
Sunny, with a high near 48.
Clear, with a low around 26.
Sunny, with a high near 52.
Partly cloudy, with a low around 34.
Sunny, with a high near 60.
Mostly clear, with a low around 43.
Mostly sunny, with a high near 61.
Partly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Oct 26
|
Mostly Sunny
|
61°F |
5 mph
W
|
|
Monday Night
Oct 26
|
Partly Cloudy
|
33°F |
5 to 10 mph
NW
|
|
Tuesday
Oct 27
|
Sunny
|
48°F |
5 to 10 mph
NW
|
|
Tuesday Night
Oct 27
|
Clear
|
26°F |
0 to 5 mph
NW
|
|
Wednesday
Oct 28
|
Sunny
|
52°F |
0 to 5 mph
SW
|
|
Wednesday Night
Oct 28
|
Partly Cloudy
|
34°F |
0 to 5 mph
SW
|
|
Thursday
Oct 29
|
Sunny
|
60°F |
5 mph
SW
|
|
Thursday Night
Oct 29
|
Mostly Clear
|
43°F |
5 mph
SW
|
|
Friday
Oct 30
|
Mostly Sunny
|
61°F |
5 to 10 mph
W
|
|
Friday Night
Oct 30
|
Partly Cloudy
|
39°F |
5 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grantham.
