| NWS Forecast for: Westmoreland County Issued by: National Weather Service Pittsburgh, PA Last Update: 1209 PM EDT Sat Sep 19 2026 |  |
| This Afternoon: Partly sunny with a 20 percent chance of showers. Highs in the upper 70s. Southeast winds around 5 mph. Tonight: Mostly cloudy. A slight chance of showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 90 percent. Sunday: Showers with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Humid with highs in the upper 70s. Southwest winds 10 to 15 mph. Chance of rain near 100 percent. Sunday Night: Considerable cloudiness. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. North winds 5 to 10 mph, becoming northeast after midnight. Chance of rain 70 percent. Monday: Mostly cloudy with a 50 percent chance of showers. Highs in the upper 60s. Northeast winds 10 to 15 mph. Monday Night: Considerable cloudiness. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 50s. Chance of rain 70 percent. Tuesday: Showers likely. Highs in the lower 60s. Chance of rain 70 percent. Tuesday Night: Showers likely. Lows around 50. Chance of rain 70 percent. Wednesday: Considerable cloudiness. Showers likely, mainly in the morning. Cool with highs around 60. Chance of rain 70 percent. Wednesday Night: Considerable cloudiness with a 50 percent chance of showers. Lows around 50. Thursday: Considerable cloudiness with a 50 percent chance of showers. Highs in the mid 60s. Thursday Night: Mostly cloudy. Lows in the upper 40s. Friday: Partly sunny. Highs in the upper 60s. | |
| Zone Forecast: Westmoreland County | |
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