Dauphin County (Harrisburg)
September
Weather in Dauphin County, Pennsylvania for September 2026
Your guide to Dauphin County weather in September - trends and predictions
So far, September 2026 in Dauphin County shows a warmer trend than usual by 2.2 °F.
The forecast for the next days in Dauphin County predicts temperatures to be around 19 °F, close to the historical average.
In general, the average temperature in Dauphin County at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.3 °F by the end of September.
The climate of Dauphin County in September is notably wet, with an average of 11 rainy days, and a total of 134.9 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
11
Rainy days
0
Snow days
24°/15°
Temperatures
13 km/h
Avg max wind
72 %
Avg humidity
Dauphin County Weather September
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Temperatures trend during September in Dauphin County
See the weather trend as well as the moving average line
September weather in Dauphin County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Fog | 29° /18° | 0.4 mm | 5 | |
| Sept. 2 |  Partly cloudy | 25° /16° | 49.9 mm | 5 | |
| Sept. 3 |  Sunny | 27° /15° | 10.2 mm | 4 | |
| Sept. 4 |  Cloudy | 28° /15° | 17 mm | 6 | |
| Sept. 5 | Sunny | 27° /15° | 1.5 mm | 6 | |
| Sept. 6 |  Light rain shower | 26° /15° | 0.4 mm | 6 | |
| Sept. 7 |  Patchy light rain | 23° /13° | 1.8 mm | 6 | |
| Sept. 8 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 9 | Partly cloudy | 28° /12° | 0.1 mm | 6 | |
| Sept. 10 | Sunny | 26° /13° | 0.1 mm | 5 | |
| Sept. 11 | Sunny | 27° /15° | 0.2 mm | 6 | |
| Sept. 12 | Sunny | 27° /14° | 0 mm | 6 | |
| Sept. 13 | Partly cloudy | 27° /15° | 5 mm | 5 | |
| Sept. 14 | Partly cloudy | 27° /15° | 0.1 mm | 7 | |
| Sept. 15 | Partly cloudy | 27° /13° | 0 mm | 7 | |
| Sept. 16 |  Overcast | 27° /13° | 0 mm | 6 | |
| Sept. 17 | Overcast | 23° /17° | 1.1 mm | 4 | |
| Sept. 18 | Mist | 25° /17° | 0.1 mm | 5 | |
| Sept. 19 | Overcast | 24° /13° | 0 mm | 5.8 | |
| Sept. 20 | Light rain shower | 25° /18° | 10.1 mm | 4.4 | |
| Sept. 21 | Patchy rain possible | 18° /14° | 5 mm | 1.3 | |
| Sept. 22 | Light rain shower | 14° /10° | 16.8 mm | 0.4 | |
| Sept. 23 | Overcast | 15° /10° | 0.1 mm | 2.9 | |
| Sept. 24 | Overcast | 18° /9° | 0 mm | 5 | |
| Sept. 25 | Sunny | 21° /9° | 0 mm | 6 | |
| Sept. 26 | Sunny | 20° /10° | 0 mm | 6 | |
| Sept. 27 | Patchy rain possible | 14° /10° | 0.2 mm | 4 | |
| Sept. 28 | Overcast | 20° /10° | 0 mm | 5 | |
| Sept. 29 | Overcast | 22° /12° | 0 mm | 6 | |
| Sept. 30 | Overcast | 20° /12° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Dauphin County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Dauphin County forecast closer to your planned date for the most up-to-date weather information.
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Dauphin County in September - FAQ
What are the expected maximum and minimum temperatures in Dauphin County during September?
During September, expect a variety of temperatures with highs around 24° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Dauphin County during September?
Significant rainfall exceeding 134.9 mm is expected in Dauphin County during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Dauphin County during September?
The average wind speed in Dauphin County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Dauphin County
Explore the daily rainfall trends and prepare for Dauphin Countys September weather 💧
Typically, Dauphin County has 11 rainy days in September with a total of 134.9 mm of rainfall.
UV exposure in Dauphin County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Dauphin County?Get accurate weather forecasts for Dauphin County, located at latitude 40.274 and longitude -76.884. Stay updated with localized weather information tailored for Dauphin County.
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