Weather in Harrisburg, Pennsylvania for September 2025
Until now, September 2025 in Harrisburg has been nearly identical to the historical average, with a temperature of 25 °F (showing only a slight deviation of 0.5 °F).
The forecast for the upcoming days in Harrisburg predicts a temperature of 26.4 °F, which is slightly above the historical average.
In general, the average temperature in Harrisburg at the beginning of September is 24.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of September.
Harrisburg experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 167.3 mm.
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Harrisburg Weather September
Temperatures trend during September in Harrisburg
September weather in Harrisburg day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Fog | 26° /17° | 0.1 mm | 6 | |
| Sept. 2 |  Partly cloudy | 24° /14° | 0 mm | 6 | |
| Sept. 3 |  Sunny | 23° /12° | 0 mm | 6 | |
| Sept. 4 |  Cloudy | 26° /12° | 15.8 mm | 6 | |
| Sept. 5 | Sunny | 27° /14° | 1.2 mm | 7 | |
| Sept. 6 |  Light rain shower | 25° /15° | 0.6 mm | 6 | |
| Sept. 7 |  Patchy light rain | 21° /13° | 2.8 mm | 5 | |
| Sept. 8 | Sunny | 22° /8° | 0 mm | 6 | |
| Sept. 9 | Partly cloudy | 25° /10° | 0 mm | 7 | |
| Sept. 10 | Sunny | 24° /10° | 0 mm | 6 | |
| Sept. 11 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 12 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 13 | Partly cloudy | 31° /12° | 0 mm | 1.5 | |
| Sept. 14 | Partly cloudy | 29° /17° | 0 mm | 1.4 | |
| Sept. 15 | Partly cloudy | 27° /18° | 0 mm | 1.3 | |
| Sept. 16 | Partly cloudy | 29° /16° | 0 mm | 1.4 | |
| Sept. 17 | Sunny | 27° /14° | 0 mm | 0 | |
| Sept. 18 | Sunny | 28° /13° | 0 mm | 5 | |
| Sept. 19 | Patchy rain possible | 33° /15° | 0.8 mm | 5 | |
| Sept. 20 | Partly cloudy | 30° /17° | 0.1 mm | 6 | |
| Sept. 21 | Partly cloudy | 28° /15° | 0 mm | 6 | |
| Sept. 22 | Partly cloudy | 25° /12° | 0 mm | 5 | |
| Sept. 23 | Patchy rain possible | 21° /16° | 4.2 mm | 4 | |
| Sept. 24 | Patchy rain possible | 21° /15° | 0.7 mm | 4 | |
| Sept. 25 | Partly cloudy | 20° /13° | 0 mm | 5 | |
| Sept. 26 | Patchy rain possible | 21° /8° | 0.2 mm | 3 | |
| Sept. 27 | Fog | 22° /18° | 0 mm | 5 | |
| Sept. 28 |  Moderate rain at times | 19° /17° | 11.1 mm | 4 | |
| Sept. 29 |  Heavy rain at times | 18° /16° | 31.9 mm | 4 | |
| Sept. 30 |  Moderate rain | 16° /14° | 44.9 mm | 4 | |
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Harrisburg in September - FAQ
September rainfall patterns in Harrisburg
UV exposure in Harrisburg during September
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Where is Harrisburg?Get accurate weather forecasts for Harrisburg, located at latitude 40.274 and longitude -76.884. Stay updated with localized weather information tailored for Harrisburg.