Philadelphia, PA – Residents across Pennsylvania and surrounding states should prepare for a warmer-than-usual autumn, according to the National Weather Service (NWS) and the Climate Prediction Center.
According to NWS Philadelphia/Mount Holly, the seasonal outlook for September through November 2025 shows above-normal temperatures are likely across much of the eastern United States, including Pennsylvania, New Jersey and Delaware. The strongest chances for warmth, above 50 percent probability, stretch across the Mid-Atlantic and New England.
Precipitation, meanwhile, is expected to trend near average for much of the Northeast, with equal chances of wetter or drier conditions. Areas farther south, including Florida and parts of the Southeast, may see above-average rainfall, while the central Plains and portions of the Southwest face an increased risk of drier-than-normal conditions.
Local climate data also highlights what residents typically experience during fall. In Philadelphia, the average high from 1991 to 2020 was 67.3 degrees, with daily lows averaging 49.6 degrees. The city’s highest recorded autumn temperature reached 91 degrees, while the lowest dropped to 26. Average rainfall for the season totals about 10.78 inches, with limited snowfall — just 0.2 inches on average.
Mount Pocono shows the widest temperature swings, with past autumn highs reaching 83 degrees and lows dipping to 14. The area also records the highest average fall rainfall in the region, with 14.82 inches.
Forecasters say the warmer pattern this fall could extend the growing season, delay peak foliage changes, and increase the likelihood of warm spells well into November. Still, officials caution that individual storm systems, especially remnants of tropical activity, could bring periods of heavy rain even in areas forecast for near-normal precipitation.
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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