Montgomery County (Dayton)
September
Weather in Montgomery County for September 2025
Your guide to Montgomery County weather in September - trends and predictions
In general, the average temperature in Montgomery County 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.
Montgomery County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 90.7 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
27°/16°
Temperatures
17 km/h
Avg max wind
60 %
Avg humidity
Montgomery County in September average weather
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  30° | 2  25° | 3  26° | 4  31° | 5 31° | 6  31° | |
| 7 20° | 8 21° | 9 28° | 10 30° | 11 32° | 12 30° | 13 28° |
| 14 31° | 15 31° | 16 29° | 17 26° | 18 26° | 19 28° | 20 30° |
| 21 30° | 22  29° | 23 22° | 24 22° | 25 24° | 26 24° | 27  25° |
| 28  19° | 29 19° | 30 21° |
You can click on date
Access Montgomery County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Montgomery County
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| 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 | |
| Next | |||||
Important Notice
Our weather forecast for Montgomery 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 Montgomery County forecast closer to your planned date for the most up-to-date weather information.
Montgomery County in September - FAQ
What are the expected maximum and minimum temperatures in Montgomery County 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 Montgomery County during September?
Moderate rainfall is anticipated in Montgomery County 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 Montgomery County during September?
The average wind speed in Montgomery County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Montgomery County
Explore the daily rainfall trends and prepare for Montgomery Countys September weather 💧
UV exposure in Montgomery County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Montgomery County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Montgomery County?Get accurate weather forecasts for Montgomery County, located at latitude 39.759 and longitude -84.192. Stay updated with localized weather information tailored for Montgomery County.
Found a mistake?
We appreciate your attention to details. Tell us here.