Grantham, NH Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grantham, NH in one place.
Sunny, with a high near 77.
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: Jul 14, 2026 8:28 PM EDT.
The active forecast window currently covers Jul 17 to Jul 21, 2026 for Grantham, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 8:28 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grantham
Monday looks like the warmest upcoming period in Grantham at 82 degrees F.
Friday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Friday at about 10 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 8:28 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
Mostly clear, with a low around 55.
A chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 50%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Rain showers likely before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 59.
Mostly sunny, with a high near 82.
A chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 61. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 79.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Sunny
|
77°F |
10 mph
NW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
55°F |
0 to 5 mph
W
|
|
Saturday
Jul 18
|
Chance Rain Showers
|
76°F |
0 to 5 mph
S
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms Likely
|
58°F |
5 mph
S
|
|
Sunday
Jul 19
|
Rain Showers Likely
|
78°F |
5 mph
W
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
59°F |
5 mph
NW
|
|
Monday
Jul 20
|
Mostly Sunny
|
82°F |
5 mph
W
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
61°F |
5 mph
S
|
|
Tuesday
Jul 21
|
Chance Rain Showers
|
79°F |
5 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grantham.
