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St. Thomas, PA Weather Forecast
St. Thomas, PA Weather Forecast Date: 1200 AM EDT Wed Oct 07 2026
The area/counties/county of: Franklin, including the city of Chambersburg.or toggle through each period.
Rest of Tonight... Clear. Lows in the lower 40s. South winds around 5 mph.
Wednesday... Sunny. Highs in the lower 70s. South winds around 5 mph.
Wednesday Night... Mostly clear. Not as cool with lows in the lower 50s. Southwest winds around 5 mph.
Thursday... Sunny. Highs in the mid 70s. West winds 5 to 10 mph.
Thursday Night... Mostly clear. Lows in the upper 40s. Northwest winds around 5 mph.
Friday... Sunny. Highs around 70.
Friday Night... Mostly clear. Lows in the upper 40s.
Saturday... Sunny. Highs in the lower 70s.
Saturday Night... Partly cloudy. Lows in the lower 50s.
Sunday... Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 50%.
Sunday Night... Showers likely. Mild. Lows in the upper 50s. Chance of rain 60%.
Columbus Day... Mostly cloudy with a 50% chance of showers. Highs in the lower 70s.
Monday Night... Mostly cloudy. Mild. Lows in the mid 50s.
POP = Probability of Precipitation
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