10-Day Weather Forecast - Mercersburg, PA

Mostly cloudy. A chance of showers and thunderstorms in the morning then showers and thunderstorms likely in the afternoon. Some thunderstorms may produce gusty winds in the afternoon. Humid with highs in the lower 80s. Southwest winds around 5 mph. Chance of rain 70 percent.

Mostly cloudy with a chance of showers and thunderstorms in the evening then partly cloudy after midnight. Patchy fog. Some thunderstorms may produce gusty winds in the evening. Humid with lows in the upper 60s. Southwest winds around 5 mph. Chance of rain 50 percent.

Patchy fog in the morning. Partly sunny in the morning then mostly cloudy with showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the mid 80s. West winds 5 to 10 mph. Chance of rain 70 percent.

Mostly cloudy. Showers likely mainly in the evening. Humid with lows in the mid 60s. Chance of rain 70 percent.

Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. Chance of rain 50 percent.

Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the lower 60s. Chance of rain 50 percent.

Mostly sunny. Highs in the lower 80s.

Partly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the mid 80s.

Partly cloudy in the evening then becoming mostly clear. Lows in the mid 60s.

Sunny. Very warm with highs around 90.

Clear. Low temperature around 70F. Dew point will be around 66F with an average humidity of 74%. Winds will be 2 mph from the W.

Mostly sunny with widely scattered thunderstorms. Chance of storms 25%. High temperature around 87F. Dew point will be around 66F with an average humidity of 62%. Winds will be 5 mph from the W.

Clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 69F. Dew point will be around 63F with an average humidity of 70%. Winds will be 4 mph from the NW.

Sunny with a slight chance of rain. Chance of precipitation 30%. High temperature around 81F. Dew point will be around 62F with an average humidity of 62%. Winds will be 4 mph from the NW.

Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 66F. Dew point will be around 61F with an average humidity of 70%. Winds will be 3 mph from the NW.

Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 81F. Dew point will be around 61F with an average humidity of 63%. Winds will be 4 mph from the NW.

Clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 66F. Dew point will be around 60F with an average humidity of 71%. Winds will be 2 mph from the NW.