Pittsburgh, PA – Fog and frost cling to rooftops and fields across western Pennsylvania this early Sunday morning, the air biting but still. The National Weather Service has issued a Frost Advisory until 9 a.m., warning of subfreezing temperatures in colder valleys and along the Allegheny River basin. Early risers should expect icy windshields and glittering grass as temperatures hover near 32°F.
Once the sun climbs higher, skies turn mostly clear and temperatures rebound quickly — highs near 58°F today and 60°F Monday. It’s a classic fall rebound, bringing crisp afternoons after chilly dawns. Residents can safely resume outdoor cleanup or early decorating for Halloween by late morning.
Monday and Tuesday remain sunny and seasonably cool, with patchy frost still possible before sunrise both days. By Tuesday afternoon, a subtle change begins: clouds thicken, and breezes shift from the south. A weak front approaches by midweek, bringing a 20–30% chance of showers Wednesday, increasing to 60% Wednesday night.
Despite that, the Halloween setup looks ideal — mild, partly sunny, and dry through Friday evening. Trick-or-treaters can expect light winds and comfortable temperatures near 55°F.
To be fair, October’s final stretch is behaving true to form — frosty starts, bright middays, and the first whisper of colder air. By next week, western Pennsylvania could see the season’s first chilly November mornings settling in.
