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Sylvan, PA Weather Forecast
Sylvan, PA Weather Forecast Date: 900 AM EDT Mon Sep 21 2026
The area/counties/county of: Franklin, including the city of Chambersburg.or toggle through each period.
Today... Mostly cloudy. A chance of showers this morning, then showers likely this afternoon. Cooler with highs in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 70%.
Tonight... Showers. A slight chance of thunderstorms after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain near 100%.
Tuesday... Showers. Highs around 60. Northeast winds 5 to 10 mph with gusts up to 25 mph. Chance of rain near 100%.
Tuesday Night... Cloudy. Showers likely, mainly in the evening. Lows around 50. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70%.
Wednesday... Mostly cloudy with a 50% chance of showers. Highs in the lower 60s. Northeast winds 5 to 10 mph with gusts up to 25 mph.
Wednesday Night... Mostly cloudy. A chance of showers in the evening. Lows in the upper 40s. Chance of rain 40%.
Thursday... Mostly cloudy. Highs in the lower 60s.
Thursday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 40s.
Friday... Mostly sunny. Highs in the mid 60s.
Friday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
Saturday... Mostly sunny. Highs in the mid 60s.
Saturday Night... Partly cloudy. Lows in the upper 40s.
POP = Probability of Precipitation
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