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Williamson, PA Weather Forecast
Williamson, PA Weather Forecast Date: 1030 AM EDT Fri Oct 02 2026
The area/counties/county of: Franklin, including the city of Chambersburg.or toggle through each period.
Today... Partly sunny. A chance of showers with a slight chance of thunderstorms this afternoon. Continued unseasonably warm with highs in the mid 80s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50%.
Tonight... Mostly cloudy. A chance of showers in the evening. Lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 50%.
Saturday... Mostly sunny. Much cooler with highs in the upper 60s. Northeast winds around 5 mph.
Saturday Night... Mostly clear in the evening, then becoming mostly cloudy. Lows in the lower 50s. Northeast winds around 5 mph.
Sunday... Cloudy with a 50% chance of showers. Highs in the mid 60s. Southeast winds around 5 mph.
Sunday Night... Mostly cloudy. A chance of showers in the evening. Lows in the lower 50s. Chance of rain 40%.
Monday... Sunny. Highs in the upper 60s.
Monday Night... Mostly clear. Cooler with lows in the lower 40s.
Tuesday... Sunny. Highs in the lower 60s.
Tuesday Night... Mostly clear. Lows around 40.
Wednesday... Sunny. Highs in the mid 60s.
Wednesday Night... Mostly clear. Lows in the mid 40s.
POP = Probability of Precipitation
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