hiladelphia, PA – Much of the eastern United States experienced its coolest August in decades, with several cities in Pennsylvania, New Jersey, and beyond recording below-normal average temperatures.
According to the National Weather Service in Philadelphia/Mount Holly, average daily high and low temperatures in August 2025 were significantly lower than usual across the Mid-Atlantic and Northeast. The weather service noted that in many areas, the month ranked among the coldest Augusts in more than 20 years.
Philadelphia, for example, reported an average temperature of 74.9 degrees, the coolest August since 2014. Atlantic City, New Jersey, recorded its chilliest August since 2000, while Allentown, Pennsylvania, saw its coolest since 2008. Other cities across the region reported similar records, with some dating back to the early 1990s.
The unusual cooldown came just weeks after a notably steamy July across much of the country. Meteorologists said the shift highlights the sharp variability in seasonal weather patterns. “After the extreme heat we saw in July, this August’s widespread cool-down stands out as one of the most significant in recent memory,” the weather service said.
In neighboring states, New York City’s Central Park recorded its coolest August since 2008, while Wilmington, Delaware, logged its coldest since 1992. Farther south, Richmond, Virginia, had its coolest August since 1997.
Forecasters stressed that while cooler months can offer temporary relief, they do not signal an end to broader warming trends. Seasonal weather shifts are expected to continue into September, with cooler nights and mild daytime highs likely across much of the eastern U.S.
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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