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Keystone Lake, PA 7-Day Night Weather Forecast
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Keystone Lake, PA Weather Forecast
Keystone Lake, PA Weather Forecast Date: 223 PM EDT Sun Aug 16 2026
The area/counties/county of: Westmoreland, including the cities of: Murrysville, Greensburg, New Kensington, Lower Burrell, Latrobe, and Monessen.or toggle through each period.
This Afternoon... Showers with thunderstorms likely. Some thunderstorms May produce heavy rainfall. Near steady temperature in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain near 100%.
Tonight... Showers with thunderstorms likely in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Some thunderstorms May produce heavy rainfall. Humid with lows around 70. Southwest winds 10 to 15 mph. Chance of rain near 100%.
Monday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of rain 50%.
Monday Night... Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Patchy fog after midnight. Humid with lows in the upper 50s. North winds 5 to 10 mph. Chance of rain 50%.
Tuesday... Areas of fog in the morning. Mostly sunny. Highs around 80. Northwest winds around 5 mph.
Tuesday Night... Mainly clear. Lows around 60.
Wednesday... Mostly sunny in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50%.
Wednesday Night... Showers likely with a chance of thunderstorms. Lows in the lower 60s. Chance of rain 60%.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 50%.
Thursday Night... Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 50s. Chance of rain 50%.
Friday... Partly cloudy. Highs in the upper 70s.
Friday Night... Partly cloudy. Lows in the upper 50s.
POP = Probability of Precipitation
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