| NWS Forecast for: Jefferson County Issued by: National Weather Service Pittsburgh, PA Last Update: 1103 AM EDT Sat Sep 19 2026 | |
| This Afternoon: Partly sunny. A slight chance of showers early. Highs in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Tonight: Mostly cloudy. A chance of showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Southeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 90 percent. Sunday: A slight chance of thunderstorms. Showers. Locally heavy rainfall possible in the afternoon. Humid with highs in the lower 70s. South winds 5 to 10 mph, becoming west in the afternoon. Chance of rain near 100 percent. Sunday Night: Mostly cloudy. A slight chance of showers in the evening. Lows in the upper 40s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Monday: Mostly cloudy. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Monday Night: Considerable cloudiness with a 50 percent chance of showers. Lows in the upper 40s. Tuesday: Showers likely, mainly in the morning. Cool with highs in the upper 50s. Chance of rain 60 percent. Tuesday Night: Considerable cloudiness with a 50 percent chance of showers. Lows in the mid 40s. Wednesday: Considerable cloudiness with a 50 percent chance of showers. Cool with highs in the upper 50s. Wednesday Night: Considerable cloudiness with a chance of showers. Lows in the mid 40s. Chance of rain 50 percent. Thursday: Mostly cloudy with a chance of showers. Highs in the lower 60s. Chance of rain 50 percent. Thursday Night: Mostly cloudy. A chance of showers in the evening. Lows in the mid 40s. Chance of rain 40 percent. Friday: Partly sunny. Highs in the mid 60s. | |
| Zone Forecast: Jefferson County | |
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