Pittsburgh, PA – A sharp chill is settling over western Pennsylvania this Friday morning, signaling the region’s first real taste of late-fall weather. By Friday night, clear skies and calm winds could send temperatures tumbling near the freezing mark—cold enough for patchy frost across Allegheny and surrounding counties. Gardeners and outdoor enthusiasts should plan ahead: tender plants and produce may need covering to avoid damage.
According to the National Weather Service in Pittsburgh, Friday will feature partial sunshine and a few passing showers early in the day, with highs reaching near 53°F. As skies clear late, temperatures will fall rapidly—bottoming out near 32°F in some outlying valleys by dawn Saturday. That’s when frost is most likely to form, especially north and east of the city where winds calm completely.
Saturday will feel crisp but pleasant, with bright sunshine and highs in the mid-50s. The air will stay dry and clean—ideal for outdoor plans, fall cleanups, or early Halloween decorating. Sunday brings similar weather, a touch milder with highs near 58°F, before the next system approaches from the west early next week.
By Monday night into Tuesday, clouds return with light showers possible, marking the next transition in this classic October pattern. No snow is in the cards yet, but the first frosty wake-up of the season is a clear reminder—winter is drawing closer across Pennsylvania.
