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City of Williamsport, PAWilliamsport, PA 7-Day Night Weather Forecast
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Williamsport, PA Weather Forecast
Williamsport, PA Weather Forecast Date: 1030 AM EDT Thu Oct 15 2026
The area/counties/county of: Southern Lycoming, including the city of Williamsport.or toggle through each period.
Today... Mostly cloudy this morning, then becoming mostly sunny. Cooler with highs in the lower 60s. Northeast winds around 5 mph, becoming southeast this afternoon.
Tonight... Mostly cloudy. A slight chance of rain in the evening, then rain with a slight chance of thunderstorms after midnight. Mild. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90%.
Friday... Rain likely in the morning, then showers in the afternoon. Warmer with highs in the lower 70s. South winds 10 to 15 mph, becoming southwest in the afternoon. Gusts up to 30 mph. Chance of rain 90%.
Friday Night... Mostly cloudy. A chance of showers in the evening. Cooler. Less humid with lows around 40. Northwest winds 15 to 20 mph. Gusts up to 30 mph, increasing to 40 mph after midnight. Chance of rain 40%.
Saturday... Mostly sunny. Much cooler with highs in the upper 40s. North winds 15 to 20 mph with gusts up to 40 mph.
Saturday Night... Clear. Widespread frost after midnight. Lows in the lower 30s.
Sunday... Widespread frost in the morning. Sunny. Highs in the upper 50s.
Sunday Night... Mostly clear. Areas of frost after midnight. Lows in the mid 30s.
Monday... Areas of frost in the morning. Sunny. Highs around 60.
Monday Night... Partly cloudy. Lows around 40.
Tuesday... Mostly sunny. Highs in the lower 60s.
Tuesday Night... Partly cloudy. Lows around 40.
POP = Probability of Precipitation
Williamsport Radar Loop
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