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Keystone Weather Forecast
Keystone, PA Weather Forecast Date: 335 PM EDT Sat Sep 19 2026
Weather forecast for Keystone, PA
Tonight Lo: 55°F Lo: 13°C |
Tonight... Partly cloudy this evening, then mostly cloudy with showers after midnight. Lows in the mid 50s. Southeast winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 90%. |
Sun Hi: 71°FHi: 22°C Lo: 50°F Lo: 10°C |
Sunday... Showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 70s. South winds 5 to 10 mph with gusts up to 30 mph. Chance of rain near 100%. |
Mon Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Monday... Mostly cloudy. Highs in the upper 60s. Northeast winds 5 to 10 mph with gusts up to 25 mph. |
Tue Hi: 61°FHi: 16°C Lo: 45°F Lo: 7°C |
Tuesday... Mostly cloudy with a 40% chance of showers. Highs in the lower 60s. |
| Wed Hi: 61°FHi: 16°C Lo: 45°F Lo: 7°C |
Wednesday... Partly sunny. Highs in the lower 60s. |
| Thu Hi: 61°FHi: 16°C Lo: 45°F Lo: 7°C |
Thursday... Mostly cloudy. Highs in the lower 60s. |
| Fri Hi: 65°FHi: 18°C Lo: 45°F Lo: 7°C |
Friday... Mostly cloudy with a 30% chance of showers. Highs in the mid 60s. |
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