10-Day Weather Forecast - Mercersburg, PA

Mostly sunny. Highs in the mid 80s. East winds around 5 mph.

Mostly clear. Lows in the upper 50s. Southeast winds around 5 mph.

Sunny. Highs in the mid 80s. Light and variable winds becoming southeast around 5 mph in the afternoon.

Mostly clear. Lows around 60.

Sunny. Very warm with highs in the upper 80s.

Mostly clear. Lows in the lower 60s.

Sunny. Very warm with highs in the lower 90s.

Mostly clear. Humid with lows in the upper 60s.

Sunny hot with highs in the mid 90s.

Partly cloudy. Humid warm with lows around 70.

Mostly sunny. A chance of showers and thunderstorms in the afternoon. Humid hot with highs in the lower 90s. Chance of rain 30 percent. Heat index values around 100.

Partly cloudy with a 40% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 70F with an average humidity of 81%. Winds will be 2 mph from the W.

Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 91F. Dew point will be around 71F with an average humidity of 67%. Winds will be 2 mph from the W.

Partly cloudy with a 25% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 68F with an average humidity of 74%. Winds will be 2 mph from the W.

Mostly sunny. High temperature around 91F. Dew point will be around 70F with an average humidity of 69%. Winds will be 2 mph from the W.

Partly cloudy with a 25% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 67F with an average humidity of 74%. Winds will be 1 mph from the NW.

Mostly sunny. High temperature around 90F. Dew point will be around 70F with an average humidity of 69%. Winds will be 2 mph from the W.

Partly cloudy with a 25% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 67F with an average humidity of 74%. Winds will be 1 mph from the NW.