Grantham, NH Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Grantham, NH in one place.
A chance of rain showers between 11am and 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 62. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
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: May 30, 2026 6:35 PM EDT.
The active forecast window currently covers May 31 to Jun 5, 2026 for Grantham, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 5, 2026
- Latest sync
- May 30, 2026 6:35 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grantham
Friday looks like the warmest upcoming period in Grantham at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Sunday at about 5 to 10 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 6:35 PM EDT
- Coverage
- 6 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
Showers and thunderstorms likely before 5am. Mostly cloudy, with a low around 42. Northwest wind 5 to 10 mph. Chance of precipitation is 60%.
Rain showers likely after 7am. Partly sunny, with a high near 60. Northeast wind around 5 mph. Chance of precipitation is 60%.
A slight chance of rain showers before 8pm. Mostly clear, with a low around 42.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 66.
A slight chance of rain showers before 10pm. Partly cloudy, with a low around 44.
Mostly sunny, with a high near 69.
Mostly clear, with a low around 47.
Sunny, with a high near 76.
Mostly clear, with a low around 53.
Mostly sunny, with a high near 80.
A slight chance of rain showers after 5am. Partly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 31
|
Showers And Thunderstorms Likely
|
62°F |
5 to 10 mph
NW
|
|
Sunday Night
May 31
|
Showers And Thunderstorms Likely
|
42°F |
5 to 10 mph
NW
|
|
Monday
Jun 1
|
Rain Showers Likely
|
60°F |
5 mph
NE
|
|
Monday Night
Jun 1
|
Slight Chance Rain Showers then Mostly Clear
|
42°F |
5 mph
SW
|
|
Tuesday
Jun 2
|
Mostly Sunny then Slight Chance Rain Showers
|
66°F |
5 mph
NW
|
|
Tuesday Night
Jun 2
|
Slight Chance Rain Showers then Partly Cloudy
|
44°F |
5 mph
N
|
|
Wednesday
Jun 3
|
Mostly Sunny
|
69°F |
5 mph
N
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
47°F |
5 mph
W
|
|
Thursday
Jun 4
|
Sunny
|
76°F |
5 mph
NW
|
|
Thursday Night
Jun 4
|
Mostly Clear
|
53°F |
5 mph
W
|
|
Friday
Jun 5
|
Mostly Sunny
|
80°F |
5 to 10 mph
W
|
|
Friday Night
Jun 5
|
Partly Cloudy then Slight Chance Rain Showers
|
56°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grantham.
