Dayton (OH)
September
Weather in Dayton, Ohio for September 2026
Your guide to Dayton weather in September - trends and predictions
So far, September 2026 in Dayton shows a warmer trend than usual by 2.4 °F.
Expect cooler weather in the next days in Dayton with the forecast suggesting a temperature of 25.9 °F, lower than the historical average.
In general, the average temperature in Dayton at the beginning of September is 28 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.1 °F by the end of September.
The climate of Dayton in September is notably wet, with an average of 11 rainy days, and a total of 210.9 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
11
Rainy days
0
Snow days
26°/15°
Temperatures
15 km/h
Avg max wind
64 %
Avg humidity
Dayton Weather September
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Temperatures trend during September in Dayton
See the weather trend as well as the moving average line
September weather in Dayton day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /17° | 0 mm | 7 | |
| Sept. 2 | Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 29° /16° | 0 mm | 7 | |
| Sept. 4 |  Partly cloudy | 29° /17° | 8.9 mm | 7 | |
| Sept. 5 | Sunny | 28° /16° | 9 mm | 6 | |
| Sept. 6 |  Patchy light rain | 26° /14° | 11.1 mm | 6 | |
| Sept. 7 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 8 | Sunny | 25° /10° | 0 mm | 5 | |
| Sept. 9 | Sunny | 29° /13° | 5 mm | 7 | |
| Sept. 10 | Sunny | 27° /15° | 1.3 mm | 5 | |
| Sept. 11 | Overcast | 28° /16° | 5.5 mm | 5 | |
| Sept. 12 | Overcast | 28° /16° | 33.1 mm | 5 | |
| Sept. 13 | Overcast | 28° /16° | 0.5 mm | 6 | |
| Sept. 14 | Partly cloudy | 28° /16° | 0 mm | 7 | |
| Sept. 15 | Sunny | 29° /15° | 0.5 mm | 7.1 | |
| Sept. 16 | Sunny | 30° /22° | 7 mm | 6.8 | |
| Sept. 17 | Overcast | 26° /23° | 4 mm | 7 | |
| Sept. 18 | Partly cloudy | 26° /21° | 1.3 mm | 7 | |
| Sept. 19 | Sunny | 29° /20° | 6.5 mm | 7 | |
| Sept. 20 |  Patchy rain possible | 28° /20° | 3.8 mm | 7 | |
| Sept. 21 | Partly cloudy | 31° /22° | 21.1 mm | 7 | |
| Sept. 22 | Light rain shower | 25° /19° | 10.6 mm | 5 | |
| Sept. 23 | Sunny | 25° /17° | 0 mm | 6 | |
| Sept. 24 | Sunny | 22° /13° | 0.3 mm | 5 | |
| Sept. 25 | Sunny | 18° /11° | 0 mm | 5 | |
| Sept. 26 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 27 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 28 | Sunny | 27° /17° | 0 mm | 7 | |
| Sept. 29 |  Fog | 24° /15° | 14 mm | 5 | |
| Sept. 30 | Fog | 24° /16° | 4.9 mm | 6 | |
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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.
Change Month
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 26° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Dayton during September?
Significant rainfall exceeding 210.9 mm is expected in Dayton during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Dayton during September?
The average wind speed in Dayton during September is 15 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 💧
Typically, Dayton has 11 rainy days in September with a total of 210.9 mm of rainfall.
UV exposure in Dayton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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