Pennsylvania Weather Alert: Fall Chill Follows Columbus Day Sunshine by Tuesday

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PITTSBURGH, Pa. – A stretch of classic fall weather settles over western Pennsylvania after a damp start to Columbus Day weekend, with sunny skies and cooler air taking over by Tuesday morning. Morning commuters and families returning to school after the holiday can expect brisk air, calm winds, and bright sun across Allegheny County and nearby communities.

According to the National Weather Service in Pittsburgh, a weak disturbance could bring a few light showers early Sunday morning before skies quickly clear. Temperatures will climb near 70°F today before dipping into the upper 40s overnight. Cooler, calmer conditions will dominate through midweek as high pressure moves in from the Ohio Valley, bringing several clear days ideal for outdoor cleanup, pumpkin patch trips, and fall leaf viewing along I-79 and I-376.

By Tuesday, sunshine and light winds return with highs in the low 70s, followed by a notable drop in temperatures midweek. Wednesday morning lows could fall into the upper 30s in rural valleys, hinting at the season’s first frost risk north of the city. Residents should prepare gardens, protect sensitive plants, and dress in layers for chilly mornings followed by mild afternoons.

No major rain systems are expected through Thursday, giving western Pennsylvania several golden fall days to enjoy before colder air arrives later in the month.


Five-Day Forecast for Pittsburgh, PA:
Sun: 70/50 – Partly sunny; brief morning showers east of I-79.
Mon: 71/49 – Mostly sunny; light winds, pleasant holiday weather.
Tue: 73/47 – Sunny, calm; cooler start for morning commute.
Wed: 64/38 – Mostly sunny; crisp air, patchy frost north.
Thu: 61/40 – Sunny, dry; great for outdoor plans.

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