| NWS Forecast for: Mercer County Issued by: National Weather Service Pittsburgh, PA Last Update: 1248 AM EDT Sat Sep 19 2026 |  |
| Overnight: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph. Today: Mostly cloudy. Highs in the mid 70s. East winds 5 to 10 mph. Tonight: Considerable cloudiness with a slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 60s. Southeast winds 5 to 10 mph. Chance of rain 70 percent. Sunday: A slight chance of thunderstorms. Showers with highs in the lower 70s. Southwest winds 5 to 10 mph, becoming northwest with gusts up to 20 mph in the afternoon. Chance of rain 90 percent. Sunday Night: Mostly cloudy. A chance of showers in the evening. Less humid with lows around 50. Northeast winds 5 to 10 mph. Chance of rain 50 percent. Monday: Mostly cloudy. Highs in the mid 60s. Monday Night: Considerable cloudiness with a 50 percent chance of showers. Lows in the upper 40s. Tuesday: Considerable cloudiness with a 50 percent chance of showers. Highs in the lower 60s. Tuesday Night: Considerable cloudiness. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 40s. Chance of rain 60 percent. Wednesday: Considerable cloudiness. Showers likely, mainly in the morning. Highs in the lower 60s. Chance of rain 60 percent. Wednesday Night: Showers likely. Lows in the upper 40s. Chance of rain 60 percent. Thursday: Mostly cloudy. Showers likely, mainly in the morning. Highs in the mid 60s. Chance of rain 60 percent. Thursday Night: Mostly cloudy. Lows in the upper 40s. Friday: Partly sunny in the morning, then becoming partly cloudy. Highs in the upper 60s. | |
| Zone Forecast: Mercer County | |
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