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 82. Northwest wind 5 to 10 mph, with gusts as high as 25 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: Jun 12, 2026 11:24 PM EDT.
The active forecast window currently covers Jun 13 to Jun 19, 2026 for Grantham, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 13 to Jun 19, 2026
- Latest sync
- Jun 12, 2026 11:24 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grantham
Sunday looks like the warmest upcoming period in Grantham at 86 degrees F.
Monday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Thursday Night at about 10 to 15 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 12, 2026 11:24 PM EDT
- Coverage
- 7 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 58. West wind 5 to 10 mph.
A slight chance of rain showers after 3pm. Partly sunny, with a high near 86. Southwest wind 5 to 10 mph.
A chance of rain showers before 8pm, then showers and thunderstorms. Mostly cloudy, with a low around 56. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
A chance of rain showers before 8am. Mostly sunny, with a high near 73. Chance of precipitation is 40%.
Mostly clear, with a low around 50.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 51.
A chance of rain showers after noon. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Rain showers likely. Partly sunny, with a high near 76. Chance of precipitation is 70%.
Rain showers likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
A chance of rain showers. Partly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jun 13
|
Sunny
|
82°F |
5 to 10 mph
NW
|
|
Saturday Night
Jun 13
|
Mostly Clear
|
58°F |
5 to 10 mph
W
|
|
Sunday
Jun 14
|
Partly Sunny then Slight Chance Rain Showers
|
86°F |
5 to 10 mph
SW
|
|
Sunday Night
Jun 14
|
Showers And Thunderstorms
|
56°F |
10 mph
SW
|
|
Monday
Jun 15
|
Chance Rain Showers then Mostly Sunny
|
73°F |
10 mph
W
|
|
Monday Night
Jun 15
|
Mostly Clear
|
50°F |
5 to 10 mph
W
|
|
Tuesday
Jun 16
|
Mostly Sunny
|
73°F |
5 to 10 mph
W
|
|
Tuesday Night
Jun 16
|
Partly Cloudy
|
51°F |
5 mph
SW
|
|
Wednesday
Jun 17
|
Mostly Sunny then Chance Rain Showers
|
76°F |
5 mph
SW
|
|
Wednesday Night
Jun 17
|
Chance Rain Showers
|
53°F |
5 mph
S
|
|
Thursday
Jun 18
|
Rain Showers Likely
|
76°F |
5 to 10 mph
S
|
|
Thursday Night
Jun 18
|
Rain Showers Likely
|
57°F |
10 to 15 mph
SW
|
|
Juneteenth
Jun 19
|
Chance Rain Showers
|
75°F |
10 to 15 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grantham.
