Philadelphia/ Weather & Environment

Philly Sizzles to 88 Before Weekend Thunderstorms Crash Outdoor Plans

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Published on September 10, 2026
Philly Sizzles to 88 Before Weekend Thunderstorms Crash Outdoor PlansSource: Mefman00 / Wikimedia Commons

Philadelphia is waking up to mostly sunny conditions Thursday after any early showers cleared by daybreak, but the city is headed for a warm 88-degree afternoon before rain chances return after dark. The bigger weather plot arrives this weekend, when showers and thunderstorms could complicate Saturday night and Sunday plans.

Warm, Mostly Dry Thursday

Temperatures are near 75 degrees early Thursday, with partly sunny skies expected by late morning and west winds around 5 to 10 mph. The daytime rain chance stays low, with only a slight possibility of a stray shower and rainfall totals expected to remain under a tenth of an inch, according to the National Weather Service office in Mount Holly.

That changes after 7 p.m., when a 50% chance of showers arrives under mostly cloudy skies. Thursday night is expected to remain cloudy, with temperatures around 70 to 73 degrees, and no watches, warnings or advisories are listed for Philadelphia in the latest forecast.

Friday Offers A Brief Weather Reset

Friday looks like the easiest day for outdoor plans, with a slight chance of an early-morning shower followed by partly sunny skies and a high near 82. North winds around 5 mph will keep conditions fairly quiet, while Friday night turns mostly clear and cooler, with a low near 63.

The timing is a notable refinement from Hoodline's earlier Philly forecast, which also identified Thursday as the week's weather pivot but placed more emphasis on rain arriving during the afternoon. The latest outlook keeps most of Thursday dry in the city and shifts the more meaningful storm concerns toward the weekend.

Weekend Storm Chances Build

Saturday starts partly sunny with a high near 82, but a slight chance of showers develops after 2 p.m. The more unsettled stretch arrives Saturday night, when showers and thunderstorms become increasingly likely and the rain chance reaches 70%.

Sunday brings only a chance of showers before 2 p.m.; thunderstorms are not specifically forecast for Sunday afternoon, and the high should reach near 84. Some storms could drop heavy rain quickly, so outdoor events should have an indoor backup and drivers should be alert for ponding on roads and in poor-drainage areas.

Sunshine Returns Monday

The forecast improves Sunday night, with only a slight chance of a shower or thunderstorm before partly cloudy skies take over. Monday looks partly cloudy with a high near 82, followed by another warm, mostly sunny day Tuesday near 85.