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Allegheny County, PA 7-Day Night Weather Forecast
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Allegheny County, PA Weather Forecast
Allegheny County, PA Weather Forecast Date: 202 PM EDT Tue Aug 25 2026
The area/counties/county of: Allegheny, including the city of Pittsburgh Metro Area.or toggle through each period.
This Afternoon... Partly cloudy. Near steady temperature in the upper 70s. Northwest winds 5 to 10 mph.
Tonight... Partly cloudy in the evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. Northwest winds around 5 mph, becoming southeast after midnight.
Wednesday... Patchy fog in the morning. Partly cloudy. Highs in the lower 80s. South winds around 5 mph.
Wednesday Night... Mainly clear. Lows in the lower 60s. South winds around 5 mph.
Thursday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. Southwest winds 5 to 10 mph. Chance of rain 50%.
Thursday Night... A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Patchy fog in the evening. Areas of fog after midnight. Lows in the lower 60s. Chance of rain 50%.
Friday... Partly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s.
Friday Night... Mainly clear. Lows in the upper 50s.
Saturday... Mostly sunny. Highs in the lower 80s.
Saturday Night... Mainly clear. Lows in the lower 60s.
Sunday... Mostly sunny. Highs in the mid 80s.
Sunday Night... Mainly clear. Lows in the mid 60s.
POP = Probability of Precipitation
Allegheny County Radar Loop
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