Pennsylvania wakes to crisp air and quiet streets, but winter signals are growing louder.
By Sunday, December 14, snow may fall across the Philadelphia region, bringing the season’s first meaningful travel impacts and a reminder that December weather can turn quickly.
According to the National Weather Service, clouds thicken Saturday before precipitation develops late. Rain may start first, then change to snow as colder air settles in. By early Sunday, 2 to 4 inches of snow are possible in parts of the metro area. Even lighter totals could snarl travel if roads cool rapidly.
Temperatures fall toward freezing as snow tapers. That transition raises concern for slushy pavement refreezing, especially on bridges, side streets, and parking lots. Drivers should plan extra time Sunday morning and watch for slick spots that may not be visible.
Meteorologists are tracking a broader winter pattern pushing east. Arctic air continues sliding south, reinforcing colder conditions behind the system. While snowfall amounts remain modest for now, this setup serves as an early sign of winter’s takeover, with additional cold snaps possible into next week.
Winds ease as skies clear Sunday night, but temperatures drop sharply. Any leftover moisture may freeze again by early Monday. Residents should keep winter gear ready and avoid assuming roads will improve quickly after snow ends.
This system arrives as many prepare for early holiday travel and seasonal errands. Conditions may change fastest before sunrise Sunday and again after sunset as temperatures fall.
Five-Day Outlook for Philadelphia
- Saturday: Mostly cloudy, high near 42°F
- Sunday: Chance of snow, high near 32°F
- Monday: Mostly sunny, high near 30°F
- Tuesday: Mostly sunny, high near 33°F
- Wednesday: Partly sunny, high near 42°F
