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Armstrong, PA Weather Forecast
Armstrong, PA Weather Forecast Date: 300 AM EDT Sun Oct 11 2026
The area/counties/county of: Southern Lycoming, including the city of Williamsport.or toggle through each period.
Rest of Tonight... Cloudy with a 50% chance of rain. Not as cool. Near steady temperature in the mid 50s. East winds 5 to 10 mph with gusts up to 20 mph.
Sunday... Rain. Patchy fog. A slight chance of thunderstorms in the afternoon. Highs in the upper 50s. East winds 5 to 10 mph with gusts up to 25 mph. Chance of rain near 100%.
Sunday Night... Cloudy. Rain likely, mainly in the evening. Patchy fog. Mild. Lows in the mid 50s. East winds 5 to 10 mph with gusts up to 25 mph, becoming north after midnight. Chance of rain 70%.
Columbus Day... Patchy fog in the morning. Mostly sunny. Warmer with highs in the lower 70s. Northwest winds 5 to 10 mph.
Monday Night... Partly cloudy. Mild. Lows in the mid 50s. West winds around 5 mph.
Tuesday... Mostly sunny. Warm with highs in the mid 70s.
Tuesday Night... Partly cloudy. Unseasonably mild. Lows in the lower 60s.
Wednesday... Mostly sunny. Highs in the lower 70s.
Wednesday Night... Partly cloudy. Cooler with lows in the upper 40s.
Thursday... Mostly sunny. Highs in the mid 60s.
Thursday Night... Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the upper 40s. Chance of rain 50%.
Friday... Mostly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Highs in the mid 60s. Chance of rain 60%.
Friday Night... Mostly cloudy. Showers likely, mainly in the evening. Lows in the mid 40s. Chance of rain 60%.
POP = Probability of Precipitation
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