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Pa-647 Reservoir, PA 7-Day Night Weather Forecast
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Pa-647 Reservoir, PA Weather Forecast
Pa-647 Reservoir, PA Weather Forecast Date: 257 AM EDT Wed Sep 02 2026
The area/counties/county of: Washington, including the cities of: Washington and Canonsburg.or toggle through each period.
Overnight... Partly cloudy with a slight chance of showers and thunderstorms. Warm. Near steady temperature in the lower 70s. South winds around 5 mph. Chance of rain 20%.
Today... Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs around 90. Southwest winds 5 to 10 mph. Chance of rain 20%. Heat index values in the upper 90s in the afternoon.
Tonight... Mainly clear. A chance of showers with a slight chance of thunderstorms after midnight. Warm with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 50%.
Thursday... Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Unseasonably warm. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 50%. Heat index values in the upper 90s.
Thursday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Warm with lows around 70. West winds 5 to 10 mph. Chance of rain 70%.
Friday... A chance of thunderstorms. Showers, warm with highs in the mid 80s. Chance of rain 90%.
Friday Night... Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers after midnight. Warm with lows in the mid 60s. Chance of rain 90%.
Saturday... Partly sunny in the morning, then becoming partly cloudy. Highs in the upper 70s.
Saturday Night... Mainly clear. Lows in the upper 50s.
Sunday... Mostly sunny. Highs in the upper 70s.
Sunday Night... Mainly clear. Lows in the upper 50s.
Labor Day... Partly cloudy. Highs around 80.
Monday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s.
POP = Probability of Precipitation
Pa-647 Reservoir Radar Loop
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