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South Mountain, PA 7-Day Night Weather Forecast
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South Mountain, PA Weather Forecast
South Mountain, PA Weather Forecast Date: 730 PM EDT Sun Aug 02 2026
The area/counties/county of: Franklin, including the city of Chambersburg.or toggle through each period.
Tonight... Cloudy with a chance of thunderstorms. Showers, mainly this evening. Lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 90%.
Monday... Mostly cloudy. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of rain 20%.
Monday Night... Mostly cloudy. Humid with lows in the mid 60s. North winds around 5 mph.
Tuesday... Partly sunny. Highs in the lower 80s. East winds around 5 mph.
Tuesday Night... Mostly cloudy. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable.
Wednesday... Partly sunny. A chance of showers in the afternoon. Humid with highs in the mid 80s. Chance of rain 30%.
Wednesday Night... Mostly cloudy. A chance of showers in the evening. Humid with lows in the upper 60s. Chance of rain 30%.
Thursday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Chance of rain 50%.
Thursday Night... Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the upper 60s. Chance of rain 50%.
Friday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 80s. Chance of rain 50%.
Friday Night... Mostly cloudy in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Humid with lows in the upper 60s. Chance of rain 50%.
Saturday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Chance of rain 50%.
Saturday Night... Mostly cloudy. A chance of showers and thunderstorms in the evening. Humid with lows in the upper 60s. Chance of rain 50%.
POP = Probability of Precipitation
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