Grafton County, NH Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Grafton County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers between 8am and 11am, then a slight chance of showers and thunderstorms between 11am and 1pm. Mostly sunny, with a high near 75. West wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Grafton County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 3 of 3 mapped cities in Grafton County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 20 to May 26, 2026
- Latest sync
- May 20, 2026 9:50 AM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grafton County
Today looks like the warmest upcoming period in Grafton County at 75 degrees F.
Thursday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Today at about 15 to 25 mph W.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 20, 2026 9:50 AM 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 cloudy, with a low around 42. Northwest wind 15 to 20 mph, with gusts as high as 40 mph.
Mostly sunny, with a high near 52. Northwest wind 10 to 20 mph, with gusts as high as 35 mph.
Partly cloudy, with a low around 33. Northwest wind 5 to 10 mph, with gusts as high as 25 mph.
Sunny, with a high near 58. Northwest wind 0 to 5 mph.
Partly cloudy, with a low around 40.
Mostly cloudy, with a high near 56.
A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 42.
A chance of rain showers. Partly sunny, with a high near 54. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 60. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.
A chance of rain showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.
A chance of rain showers before 10pm. Partly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
May 20
|
Slight Chance Showers And Thunderstorms
|
75°F |
15 to 25 mph
W
|
|
Tonight
May 20
|
Mostly Cloudy
|
42°F |
15 to 20 mph
NW
|
|
Thursday
May 21
|
Mostly Sunny
|
52°F |
10 to 20 mph
NW
|
|
Thursday Night
May 21
|
Partly Cloudy
|
33°F |
5 to 10 mph
NW
|
|
Friday
May 22
|
Sunny
|
58°F |
0 to 5 mph
NW
|
|
Friday Night
May 22
|
Partly Cloudy
|
40°F |
0 to 5 mph
N
|
|
Saturday
May 23
|
Mostly Cloudy
|
56°F |
0 to 5 mph
E
|
|
Saturday Night
May 23
|
Slight Chance Rain Showers
|
42°F |
0 to 5 mph
SE
|
|
Sunday
May 24
|
Chance Rain Showers
|
54°F |
0 to 5 mph
SE
|
|
Sunday Night
May 24
|
Chance Rain Showers
|
42°F |
0 to 5 mph
SE
|
|
Memorial Day
May 25
|
Chance Rain Showers
|
60°F |
0 mph
|
|
Monday Night
May 25
|
Chance Rain Showers
|
47°F |
0 mph
|
|
Tuesday
May 26
|
Chance Rain Showers
|
66°F |
0 to 5 mph
NW
|
|
Tuesday Night
May 26
|
Chance Rain Showers then Partly Cloudy
|
49°F |
0 mph
|
Major City Forecasts
Live forecast snapshots for major cities across Grafton County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Grafton County.
Largest mapped city population in this region: 13,808.