Pittsburgh, Pa. – Low gray clouds and damp air hang over the Steel City early Thursday, signaling one more unsettled stretch before a sharp fall cooldown sets in by the weekend. After light rain clears Friday, western Pennsylvania will wake up to crisp, frost-prone mornings that mark a real seasonal shift toward late October’s chill.
According to the National Weather Service in Pittsburgh, scattered showers will persist through early Thursday afternoon before tapering off this evening. Winds from the west will increase to near 20 mph, pushing drier air into the region. Friday brings partial sunshine with highs near 53°F — the last mild day before temperatures tumble into the 30s. By Saturday morning, readings could drop into the mid-30s around Allegheny County and closer to freezing across Butler, Beaver, and Westmoreland Counties.
Residents should prepare now for the area’s first frost potential of the season. Gardeners are urged to cover late plants and bring in potted herbs. Drivers may find light frost on windshields early Saturday and Sunday, especially north and east of Pittsburgh.
Saturday itself will turn bright and cool with highs near 57°F — ideal for outdoor fall festivals or game day tailgates. Sunday looks much the same, crisp and sunny with a light breeze and highs near 59°F. Looking ahead, the cooler pattern will hold through early next week, signaling that the region’s first true taste of pre-winter air is settling in. Across the central U.S., this same front is ending the growing season from Iowa to Virginia, hinting that western Pennsylvania won’t be far behind.
Five-Day Forecast for Pittsburgh, PA:
Thu: 54/38 – Chance of showers; breezy and cooler late.
Fri: 53/35 – Partly sunny; chill building into night.
Sat: 57/36 – Mostly sunny; patchy frost early north and east.
Sun: 59/38 – Bright, calm; crisp fall day.
Mon: 58/39 – Mostly sunny; steady cool pattern continues.
