Weather in Mercersburg, PA
Updated 2026-08-11 11:15 local time · ZIP codes 17236
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
84°4% rain89°2% rain87°3% rain
87°4% rain91°2% rain91°1% rain89°2% rain87°2% rain84°2% rain80°3% rain
77°5% rain76°8% 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 8%).
It feels like 89°F with winds near 9 mph.
84°F, 2% rain chance and 4 mph wind.
Visibility is around 6 mi; gusts may reach 30 mph.
Current temperature is 84°F, wind 9 mph, rain chance up to 8%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Mercersburg weather today
Sunny and 84°F in Mercersburg, PA. Today's high is 91°F with a 36% rain chance. Winds are around 9 mph with gusts near 10 mph. Relative humidity is 65%, pressure is 29.96 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Mercersburg
Sunrise is at 06:19 AM and sunset is at 08:13 PM. Tomorrow's forecast calls for Sunny with a high near 88°F and a low near 64°F. The maximum rain chance is 57%.