Philadelphia Weather Update: Dramatic Temperature Swings and Storm Threat—See This Week’s Full Forecast

A cloudy Tuesday starts Philadelphia’s mid-January stretch with afternoon highs near 49 °F and a light west wind around 10 mph, keeping the city feeling brisk despite limited precipitation chances of just 10 percent. Overnight temperatures dip to 30 °F, so refreezing is possible on untreated roads. Milder air moves in on Wednesday: expect sunshine mixing with clouds and a seasonably warm high of 51 °F before another sub-freezing night at 32 °F. The quick warm-up is brief. A fast-moving Alberta clipper arrives early Thursday, dragging Arctic air south. Forecast models show daytime readings falling to 31 °F with wind chills in the teens and the season’s best chance yet for accumulating snow from the morning commute through late night. Two to four inches are possible city-wide, with higher totals north and west. Behind the system, Friday stays cold—high 34 °F, low 21 °F—before another rebound to 46 °F Saturday as dry high pressure briefly settles in. The roller-coaster pattern resumes Sunday and Monday when a reinforcing shot of polar air drops highs to the lower 30s and lows into the upper teens. Seasonal outlooks from local meteorologists suggest that as La Niña weakens later this winter, the jet stream could aim more moisture-laden coastal storms at the Mid-Atlantic, increasing Philadelphia’s snow potential in February and early March. Travel tips: • Allow extra time Thursday; crews will need several passes to clear city streets during continuous snowfall. • Check SEPTA schedules for possible weather-related delays. • Protect exposed pipes by Wednesday night; temperatures plunge quickly after the storm. • Keep an eye on sidewalks: rapid thaw-freeze cycles through the weekend create black-ice hazards. Stay updated with real-time radar and hourly temperature changes to navigate Philadelphia weather safely throughout this turbulent week.