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Johnstown, PA Weather Forecast
Johnstown, PA Weather Forecast Date: 600 PM EDT Sun Sep 13 2026
The area/counties/county of: Cambria, including the city of Johnstown.or toggle through each period.
Tonight... Mostly cloudy. Showers likely with a chance of thunderstorms this evening, then a slight chance of showers after midnight. Some thunderstorms May produce gusty winds and small hail this evening. Cooler with lows in the mid 50s. West winds 5 to 10 mph, becoming northwest after midnight. Gusts up to 25 mph. Chance of rain 70%.
Monday... Mostly sunny. Cooler. Less humid with highs in the upper 60s. North winds 5 to 10 mph with gusts up to 25 mph.
Monday Night... Mostly clear. Lows in the upper 40s. North winds around 5 mph, becoming southeast after midnight.
Tuesday... Sunny. Highs in the lower 70s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Tuesday Night... Mostly clear. Lows in the mid 50s. Southeast winds 5 to 10 mph.
Wednesday... Mostly sunny. Very warm with highs around 80.
Wednesday Night... Partly cloudy. Humid with lows in the lower 60s.
Thursday... Partly sunny. A chance of showers in the afternoon. Humid. Very warm with highs around 80. Chance of rain 50%.
Thursday Night... Mostly cloudy with a chance of showers. Humid with lows in the lower 60s. Chance of rain 50%.
Friday... Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 40%.
Friday Night... Partly cloudy. A chance of showers in the evening. Lows in the upper 50s. Chance of rain 40%.
Saturday... Partly sunny. A chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 40%.
Saturday Night... Mostly cloudy with a 40% chance of showers. Lows in the upper 50s.
POP = Probability of Precipitation
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