Philadelphia, Pa. – Hot, muggy air sets the stage for scattered thunderstorms in Philadelphia on Sunday, with risks building by 2 p.m. Residents across the city, especially near major corridors like I-95, should stay alert for sudden downpours and brief flooding as storms sweep into the region.
According to the National Weather Service, patchy morning fog will clear, giving way to sun and a high near 88°F. After lunchtime, thunderstorms and showers are likely to develop, carrying a 30% chance of precipitation through the afternoon. The weather could lead to slick roads and reduced visibility—drivers are strongly advised to use caution, particularly along I-95 and busy city arteries. South winds near 5 mph could make conditions feel even more humid.
Localized flooding is possible where rain falls hardest, especially in low-lying areas and poorly drained streets. If thunder roars, head indoors and postpone outdoor activities until storms clear. Power outages or brief disruptions may occur if lightning strikes utility infrastructure. Secure loose items outside and charge devices ahead of any severe weather.
The threat of showers continues into Monday, with storms most likely before 11 a.m. and again by the afternoon, pushing rain chances up to 70%. Temperatures stay hot, reaching 87°F Monday and rising to 90°F by Tuesday, with thunderstorm risks persisting each afternoon.
By midweek, expect more heat and humidity. Rain chances continue daily, with highs near 90°F through Thursday and summer storms possible each afternoon.
5-Day Philadelphia Summer Weather Forecast:
- Sunday: Patchy fog, then chance of thunderstorms after 2 p.m. High: 88°F
- Monday: Showers, thunderstorms likely before and after midday. High: 87°F
- Tuesday: Partly sunny, chance of afternoon storms. High: 90°F
- Wednesday: More showers, thunderstorms possible after 2 p.m. High: 90°F
- Thursday: Partly sunny, storms possible. High: 92°F
