Philadelphia, PA – Meteorological summer 2025 brought above-average heat across parts of Pennsylvania, New Jersey, and Delaware, while rainfall varied widely from drought-like deficits to localized surpluses.
According to the National Weather Service in Philadelphia/Mount Holly, average temperatures from June through August trended near to slightly above normal. Philadelphia finished 1.1 degrees warmer than its 30-year average, at 77.4°F, while Mount Pocono was 1.6 degrees above average at 67.3°F. Reading also stood out with a 1.5-degree increase compared to normal. In contrast, Allentown and Georgetown, Del., were both slightly cooler than average by about half a degree.
Rainfall told a different story. Trenton, N.J., was among the driest spots, recording 8.11 inches of rain for the season—4.88 inches below average. Philadelphia also came in more than 4 inches drier than normal. Meanwhile, Reading and Georgetown experienced wetter-than-average summers, each finishing more than an inch above their long-term seasonal totals.
Heat extremes peaked in late June. On June 24, Philadelphia reached 101°F, Reading hit 100°F, and Atlantic City tied its seasonal maximum of 102°F on both June 24 and June 25. Cooler nights were also recorded, with Mount Pocono dropping to 38°F on June 2, well below its normal early summer low.
Heavy downpours punctuated the season. Atlantic City International Airport logged its highest one-day total of 3.07 inches on July 31, while Wilmington picked up 2.24 inches on June 30.
Forecasters noted the combination of sharp rainfall differences and recurring heat events as a hallmark of summer 2025. The data reflects what residents likely felt across the region—frequent swings between hot, dry stretches and stormy periods.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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