Philadelphia, Pennsylvania – Another surge of summer heat will send temperatures in Philadelphia soaring to near 90 degrees by Tuesday, with humidity keeping nights muggy and comfortable relief just out of reach. Drivers and anyone spending time outdoors should prepare for steady sunshine and above-average warmth through at least Thursday.
According to the National Weather Service, Monday brings clear skies and a high near 89, with winds shifting slightly but staying calm. Overnight lows only dip to the mid-60s, leaving little opportunity for true cooling. Tuesday will be the hottest day, as highs push 90 degrees, before a modest drop into the mid-80s is expected by Wednesday.
Sunny and partly cloudy conditions will hold across eastern Pennsylvania, impacting communities from King of Prussia to South Jersey suburbs, and keeping air conditioners running across the city. Commuters and residents are advised to stay hydrated, limit outdoor activity in peak heat, and check on vulnerable neighbors, especially during Tuesday’s heat spike.
Cooler, more comfortable air is expected to edge in starting late Wednesday, but daytime highs will still remain above average. Expect the warmth to linger into next weekend, with little chance for rain to bring relief. The next meaningful change could arrive late Sunday, when cloud cover increases and overnight temperatures fall closer to 70.
Residents should monitor for air quality alerts or updated advisories as heat persists. More updates will follow if new watches or warnings are issued.
Five Day Forecast for Philadelphia, PA:
- Monday: Sunny, high near 89. Low 68.
- Tuesday: Partly sunny, high near 90. Low 69.
- Wednesday: Partly sunny, high near 85. Low 69.
- Thursday: Partly sunny, high near 83. Low 66.
- Friday: Mostly sunny, high near 84. Low 70.
