Weather in South Mountain, PA
Updated 2026-09-26 11:15 local time · ZIP codes 17261
Partly Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
65°6% rain
66°10% rain
67°11% rain66°12% rain65°13% rain63°14% rain62°15% rain
63°16% rain
60°23% rain61°16% rain
61°14% rain60°15% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 23%).
It feels like 55°F with winds near 15 mph.
65°F, 6% rain chance and 15 mph wind.
Visibility is around 6 mi; gusts may reach 28 mph.
Current temperature is 65°F, wind 15 mph, rain chance up to 23%.
UV index is 2.
Local weather characteristics in South Mountain
Pennsylvania has four seasons and varied terrain. Western and northern areas are generally cooler and snowier, while southeastern areas are often milder.
South Mountain is part of the Northeast weather region. The forecast point is near 39.85°N latitude and 77.49°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.
South Mountain weather today
Partly Cloudy and 65°F in South Mountain, PA. Today's high is 67°F with a 17% rain chance. Winds are around 15 mph with gusts near 28 mph. Relative humidity is 52%, pressure is 29.97 inHg, and visibility is about 6 miles.
Tonight and tomorrow in South Mountain
Sunrise is at 07:01 AM and sunset is at 07:01 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 63°F and a low near 54°F. The maximum rain chance is 60%.