Philadelphia, PA – As September begins, the National Weather Service (NWS) has released updated temperature and precipitation outlooks for the month, giving Pennsylvania residents a preview of what to expect in the weeks ahead.
According to the NWS Climate Prediction Center, much of the eastern United States, including Pennsylvania, falls under an “equal chances” category for above or below normal temperatures. This means forecasters are not leaning strongly toward a warmer or cooler trend compared to long-term averages. Meanwhile, precipitation chances in the Mid-Atlantic also remain near normal, though areas farther south—including parts of the Southeast—are expected to see wetter conditions.
Climatological averages compiled by NWS Mount Holly show that September daily highs in Pennsylvania typically range from the low 80s in areas such as Mount Pocono to around 90 degrees in cities like Reading, Trenton, and Philadelphia. Daily lows generally fall between the low 40s in higher elevations and the low 70s in coastal regions. On average, Philadelphia sees a September daily high of 78.9 degrees and a daily low of 60.9 degrees.
Rainfall in the state varies, with Reading averaging nearly 4.9 inches for the month and Mount Pocono averaging more than 5.5 inches. The highest single-day rainfall on record for Mount Pocono in September stands at 2.17 inches.
The NWS notes that September remains a transitional month, with cooler nights arriving more frequently as fall approaches. Residents should also stay alert for tropical influences, as remnants of Atlantic storms can occasionally bring heavy rainfall to the Mid-Atlantic region during this time of year.
Forecasters encourage the public to monitor local weather updates and remain prepared for quick shifts in conditions.
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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