Philadelphia is getting a classic fall Sunday: clear skies, low-40s temperatures early, and a high near 58 by afternoon. North winds of 5 to 10 knots (about 6 to 12 mph) and a zero percent rain chance should make the city’s outdoor plans easy, although the morning will call for a jacket rather than optimism.
The cool-down returns after sunset, with clear skies and a low around 38 Sunday night. The National Weather Service says another round of frost or freeze headlines could be needed in colder parts of the region Monday morning, with freeze warnings continuing through 9 a.m. Sunday for portions of Pennsylvania and New Jersey.
Sunshine Gives Way To A Warmer Stretch
Monday should be mostly sunny with a high near 64, then Tuesday reaches 67 under mostly sunny skies. Wednesday through Friday remain mostly sunny to sunny, with highs in the low to mid-60s.
That gives Philadelphia a mostly dry run for commutes, walks and outdoor plans, with overnight lows generally in the upper 40s to around 50 after Sunday night. The extended calm pattern is a substantial update to Saturday’s Hoodline forecast.
Offshore Storm Could Complicate Coastal Plans
The bigger uncertainty is a developing nor’easter off the southern Mid-Atlantic coast. The National Weather Service says significant inland impacts are not currently considered likely, but coastal communities could face gusty northeast winds, showers and possible coastal flooding concerns for multiple days next week.
For boaters, conditions are more serious: small-craft advisories continue for Delaware Bay and coastal waters, and a gale watch is posted for Monday into Tuesday offshore. Philadelphia’s Sunday forecast remains quiet, but anyone heading toward the Jersey or Delaware coast should check the marine forecast before leaving.
Sunday Planning Notes
Sunday is the week’s best bet for a low-fuss outdoor window: bright skies, dry pavement and milder afternoon temperatures. Dress in layers for a chilly start, then keep that jacket handy after dark when readings slide back toward the upper 30s.
