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United States weather

Weather in Dayton, Ohio for September 2025

Your guide to Dayton weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Dayton is slightly cooler than the historical average by -1.8 °F.

  • The forecast for the next days in Dayton predicts temperatures to be around 27 °F, close to the historical average.

  • In general, the average temperature in Dayton at the beginning of September is 25.9 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.3 °F by the end of September.

    • Rain 🌧️

  • Dayton experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 90.7 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/16°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
60 %
Avg humidity

Dayton Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
29°
2
Sunny
26°
3
Overcast
26°
4
Partly cloudy
26°
5
Sunny
28°
6
Patchy light rain
25°
7
Sunny
21°
8
Sunny
22°
9
Sunny
27°
10
Sunny
27°
11
Sunny
29°
12
Overcast
29°
13
Overcast
28°
14
Partly cloudy
32°
15
Sunny
31°
16
Sunny
28°
17
Weather Alert Sunny
32°
18
Weather Alert Sunny
31°
19
Sunny
33°
20
Thundery outbreaks possible
33°
21
Patchy rain possible
30°
22
Partly cloudy
32°
23
Patchy rain possible
29°
24
Sunny
30°
25
Heavy rain
21°
26
Partly cloudy
22°
27
Patchy rain possible
23°
28
Patchy rain possible
19°
29
Patchy rain possible
23°
30
Patchy rain possible
25°

Temperatures trend during September in Dayton

See the weather trend as well as the moving average line

September weather in Dayton day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
 29° /14° 0 mm 7
Sept. 2 Sunny
Sunny
 26° /13° 0 mm 7
Sept. 3 Overcast
Overcast
 26° /12° 0 mm 6
Sept. 4 Partly cloudy
Partly cloudy
 26° /14° 13.4 mm 7
Sept. 5 Sunny
Sunny
 28° /14° 6.2 mm 7
Sept. 6 Patchy light rain
Patchy light rain
 25° /13° 16.6 mm 6
Sept. 7 Sunny
Sunny
 21° /10° 0 mm 6
Sept. 8 Sunny
Sunny
 22° /7° 0 mm 6
Sept. 9 Sunny
Sunny
 27° /10° 0 mm 7
Sept. 10 Sunny
Sunny
 27° /12° 0 mm 7
Sept. 11 Sunny
Sunny
 29° /16° 0 mm 7
Sept. 12 Overcast
Overcast
 29° /14° 0 mm 7
Sept. 13 Overcast
Overcast
 28° /15° 0 mm 6
Sept. 14 Partly cloudy
Partly cloudy
 32° /19° 0 mm 8
Sept. 15 Sunny
Sunny
 31° /17° 0 mm 8
Sept. 16 Sunny
Sunny
 28° /16° 0 mm 7
Sept. 17 Sunny
Sunny
 32° /17° 0 mm 1.5
Sept. 18 Sunny
Sunny
 31° /18° 0 mm 1.5
Sept. 19 Sunny
Sunny
 33° /18° 0 mm 1.5
Sept. 20 Thundery outbreaks possible
Thundery outbreaks possible
 33° /18° 0 mm 1.1
Sept. 21 Patchy rain possible
Patchy rain possible
 30° /18° 1.8 mm 0
Sept. 22 Partly cloudy
Partly cloudy
 32° /17° 0.1 mm 6
Sept. 23 Patchy rain possible
Patchy rain possible
 29° /19° 2 mm 5
Sept. 24 Sunny
Sunny
 30° /18° 0 mm 6
Sept. 25 Heavy rain
Heavy rain
 21° /18° 26.8 mm 4
Sept. 26 Partly cloudy
Partly cloudy
 22° /15° 0 mm 5
Sept. 27 Patchy rain possible
Patchy rain possible
 23° /13° 0.6 mm 4
Sept. 28 Patchy rain possible
Patchy rain possible
 19° /16° 3.8 mm 4
Sept. 29 Patchy rain possible
Patchy rain possible
 23° /15° 1.3 mm 4
Sept. 30 Patchy rain possible
Patchy rain possible
 25° /16° 0.3 mm 5
Next
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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Location coordinates Where is Dayton?

Get accurate weather forecasts for Dayton, located at latitude 39.759 and longitude -84.192. Stay updated with localized weather information tailored for Dayton.

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