Grantham, NH Weather Forecast
Sullivan County, New Hampshire
Live radar, warnings and storm tracking for Grantham, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Grantham
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Grantham, NH at a glance
Grantham is home to about 3,478 people in Sullivan County, across 27 square miles. It ranks 104th by population of 125 places in New Hampshire with a forecast here. The nearest neighbour with its own forecast is Enfield, 6 miles away.
- County
- Sullivan County
- Population
- 3,478 2023 est.
- Land area
- 27 sq mi
- People per sq mi
- 128
- Forecast point
- 43.5166°N, 72.1491°W
How well can the network see Grantham?
The nearest Doppler radar is KCXX (Burlington, VT), to the NW. Its lowest scan passes about 7,600 ft above Grantham. The beam is above the lowest few thousand feet here, so a warning for Grantham can come before anything looks dramatic on radar.
The closest weather station is KLEB (Lebanon Muni). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Grantham
- Enfield, NH6 mi
- Plainfield, NH8 mi
- Sunapee, NH9 mi
- Lebanon, NH10 mi
- Newport, NH10 mi
- New London, NH10 mi
- Claremont, NH13 mi
- Canaan, NH13 mi
Elsewhere in New Hampshire
ManchesterNashuaConcordDerryRochesterDoverAll New Hampshire forecasts →