Weather in Grantham, NH
Updated 2026-08-11 14:15 local time · ZIP codes 03753
Partly cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
80°2% rain
84°1% rain83°1% rain82°1% rain80°1% rain81°1% rain
72°1% rain69°2% rain67°2% rain66°3% rain65°3% rain56°11% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 11%).
It feels like 80°F with winds near 11 mph.
72°F, 1% rain chance and 3 mph wind.
Visibility is around 10 mi; gusts may reach 13 mph.
Current temperature is 80°F, wind 11 mph, rain chance up to 11%.
UV index is 6. Sunscreen, shade and protective clothing are recommended.
Grantham weather today
Partly cloudy and 80°F in Grantham, NH. Today's high is 84°F with a 4% rain chance. Winds are around 11 mph with gusts near 13 mph. Relative humidity is 42%, pressure is 29.81 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Grantham
Sunrise is at 05:49 AM and sunset is at 07:58 PM. Tomorrow's forecast calls for Sunny with a high near 79°F and a low near 52°F. The maximum rain chance is 36%.