Weather in Mercersburg, PA
Updated 2026-09-26 11:15 local time · ZIP codes 17236
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
65°2% rain
68°9% rain69°10% rain70°10% rain70°10% rain66°11% rain66°12% rain65°12% rain65°13% rain
64°15% rain62°17% rain62°16% 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 17%).
It feels like 57°F with winds near 12 mph.
65°F, 2% rain chance and 12 mph wind.
Visibility is around 6 mi; gusts may reach 25 mph.
Current temperature is 65°F, wind 12 mph, rain chance up to 17%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Local weather characteristics in Mercersburg
Pennsylvania has four seasons and varied terrain. Western and northern areas are generally cooler and snowier, while southeastern areas are often milder.
Mercersburg is part of the Northeast weather region. The forecast point is near 39.83°N latitude and 77.90°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.
Mercersburg weather today
Sunny and 65°F in Mercersburg, PA. Today's high is 70°F with a 8% rain chance. Winds are around 12 mph with gusts near 21 mph. Relative humidity is 49%, pressure is 29.99 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Mercersburg
Sunrise is at 07:03 AM and sunset is at 07:02 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 67°F and a low near 55°F. The maximum rain chance is 57%.