Sunday, July 19, 2026, started gray and groggy in Philadelphia, with low clouds and patchy fog clinging to the airport and temperatures parked in the low 70s as a northwest breeze picked up. The murk is expected to thin by mid-morning, setting the stage for a sunny, breezy afternoon near 85 degrees and noticeably more comfortable humidity that should hold through Monday.
Patchy Fog Then Sunny
Patchy fog is on the table before 8 a.m. Sunday, July 19, 2026, especially near the airport and other low-lying spots. After that, skies are forecast to turn mostly sunny with a high near 85. Northwest winds should run about 10 to 15 mph, with gusts up to around 25 mph in more exposed locations, so riverfront areas and the Parkway could feel a bit blustery, according to the National Weather Service.
Night And Monday
Tonight is expected to be mostly clear with a low around 65. Monday, July 20, 2026, should stay sunny with a high near 86, under light east to south winds. Dew points are forecast to run lower than they did earlier in the weekend, so the heat should feel less oppressive and outdoor plans should be more comfortable. It is a solid window for outdoor errands or an evening run before a midweek system moves in.
Storms Tuesday Into Wednesday
A stronger frontal system arrives Tuesday, July 21, 2026, bringing a high chance of showers and thunderstorms that lingers into Wednesday, July 22, 2026. Some storms could deliver heavy downpours and localized flooding, with rainfall totals of a quarter to a half inch or more possible in the heaviest cells. Small-craft advisory conditions over the waters are expected to wane early this morning, and rip current risk at area beaches is forecast to remain LOW through Monday. If you have outdoor plans for Tuesday or Wednesday, line up an indoor backup and keep an eye on updates from National Weather Service Mount Holly.
