Dayton (OH)
September
Weather in Dayton, Ohio for September 2025
Your guide to Dayton weather in September - trends and predictions
In general, the average temperature in Dayton at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22 °F by the end of September.
Dayton experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 90.7 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
27°/16°
Temperatures
17 km/h
Avg max wind
60 %
Avg humidity
Dayton Weather September
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Temperatures trend during September in Dayton
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September weather in Dayton day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 30° /18° | 0 mm | 6 | |
| Sept. 2 |  Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 26° /10° | 0 mm | 6 | |
| Sept. 4 |  Partly cloudy | 31° /13° | 0 mm | 8 | |
| Sept. 5 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 6 |  Patchy light rain | 31° /15° | 3.4 mm | 7 | |
| Sept. 7 | Sunny | 20° /8° | 0 mm | 6 | |
| Sept. 8 | Sunny | 21° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 11 | Sunny | 32° /15° | 0 mm | 8 | |
| Sept. 12 | Overcast | 30° /16° | 0 mm | 7 | |
| Sept. 13 | Overcast | 28° /17° | 0 mm | 6 | |
| Sept. 14 | Partly cloudy | 31° /18° | 0 mm | 8 | |
| Sept. 15 | Sunny | 31° /18° | 0 mm | 8 | |
| Sept. 16 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 17 | Sunny | 26° /10° | 0 mm | 7 | |
| Sept. 18 | Mist | 26° /18° | 0 mm | 6 | |
| Sept. 19 | Overcast | 28° /17° | 0 mm | 6 | |
| Sept. 20 | Partly cloudy | 30° /19° | 0 mm | 8 | |
| Sept. 21 | Overcast | 30° /20° | 0 mm | 7 | |
| Sept. 22 |  Thundery outbreaks possible | 29° /19° | 18.8 mm | 6 | |
| Sept. 23 | Fog | 22° /18° | 11.9 mm | 5 | |
| Sept. 24 | Thundery outbreaks possible | 22° /18° | 0 mm | 5 | |
| Sept. 25 | Mist | 24° /18° | 0 mm | 5 | |
| Sept. 26 | Overcast | 24° /18° | 0 mm | 5 | |
| Sept. 27 |  Heavy rain at times | 25° /19° | 5.1 mm | 6 | |
| Sept. 28 |  Moderate rain at times | 19° /17° | 13.9 mm | 4 | |
| Sept. 29 | Fog | 19° /17° | 28 mm | 4 | |
| Sept. 30 | Fog | 21° /17° | 9.8 mm | 5 | |
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Important Notice
Our weather forecast for Dayton 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 Dayton forecast closer to your planned date for the most up-to-date weather information.
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Dayton in September - FAQ
What are the expected maximum and minimum temperatures in Dayton during September?
During September, expect a variety of temperatures with highs around 27° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Dayton during September?
Moderate rainfall is anticipated in Dayton during September, with a total of 90.7 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Dayton during September?
The average wind speed in Dayton during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Dayton
Explore the daily rainfall trends and prepare for Daytons September weather 💧
UV exposure in Dayton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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