Weather in Grantham, PA
Updated 2026-09-26 12:45 local time · ZIP codes 17027
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
67°12% rain65°14% rain66°13% rain
64°16% rain65°14% rain
61°57% rain
61°34% rain62°28% rain
61°19% rain60°18% rain60°19% rain59°18% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 57% over the next 12 hours.
It feels like 57°F with winds near 17 mph.
65°F, 14% rain chance and 12 mph wind.
Visibility is around 6 mi; gusts may reach 28 mph.
Current temperature is 67°F, wind 17 mph, rain chance up to 57%.
UV index is 3. Sunscreen and sunglasses are sensible for longer outdoor time.
Local weather characteristics in Grantham
Pennsylvania has four seasons and varied terrain. Western and northern areas are generally cooler and snowier, while southeastern areas are often milder.
Grantham is part of the Northeast weather region. The forecast point is near 40.16°N latitude and 77.00°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Grantham weather today
Overcast and 67°F in Grantham, PA. Today's high is 67°F with a 45% rain chance. Winds are around 17 mph with gusts near 26 mph. Relative humidity is 52%, pressure is 29.96 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Grantham
Sunrise is at 06:59 AM and sunset is at 06:59 PM. Tomorrow's forecast calls for Overcast with a high near 63°F and a low near 54°F. The maximum rain chance is 77%.