Philadelphia, PA – A soft gray haze hangs over the Delaware River this early Sunday, the kind of calm that often comes before a change. Philadelphia’s skies will stay mostly sunny today, but subtle shifts are already underway across the region — a calm, dry pattern that won’t last long.
The National Weather Service in Mount Holly expects a tranquil stretch through Monday, with bright skies, highs in the upper 50s to lower 60s, and light northeast winds. Monday offers nearly perfect fall weather for outdoor cleanup, sports, or Halloween decorating — but clouds begin to gather by late Tuesday as a new system moves in from the Ohio Valley.
A few light showers could develop after 2 p.m. Tuesday, mainly north and west of the city. Rain chances increase Tuesday night, then rise again midweek. By Wednesday evening into Thursday, expect a 50–60% chance of rain across the Philadelphia metro, especially along I-95 and the suburbs.
The system should pull east by early Friday, leaving cooler, drier air in its wake — just in time for Halloween night. For trick-or-treaters, temperatures should hover in the upper 50s under clearing skies.
Still, subtle cooling trends in early November models hint at a chillier setup on the horizon — a brisk November ahead for much of Pennsylvania.
