September weather in Dayton, IN
The average temperature in Dayton in September is °F (°F–°F). Average precipitation: 3.00 inches.
September is a fall month in Dayton, and is cooler than the annual average of 0°F. Daylight averages about 12h 15m.
Avg High
°F
Avg Low
°F
Precipitation
3.00 in
Daylight
12h 15m
September records in Dayton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (2012) | 59.0°F (2012) | 0.02 in (2014) |
| September 2 | 95.0°F (2011) | 64.0°F (2011) | 1.33 in (2012) |
| September 3 | 95.0°F (2011) | 64.0°F (2011) | 0.54 in (2012) |
| September 4 | 96.1°F (2011) | 66.0°F (2011) | 0.62 in (2025) |
| September 5 | 91.9°F (2012) | 57.9°F (2011) | 0.14 in (2017) |
| September 6 | 81.0°F (2012) | 50.0°F (2011) | 0.76 in (2014) |
| September 7 | 90.0°F (2012) | 48.9°F (2011) | 0.38 in (2023) |
| September 8 | 90.0°F (2012) | 53.1°F (2011) | 1.37 in (2018) |
| September 9 | 75.9°F (2012) | 54.0°F (2012) | 1.18 in (2016) |
| September 10 | 78.1°F (2012) | 48.9°F (2012) | 0.71 in (2016) |
| September 11 | 82.0°F (2012) | 48.0°F (2012) | 0.97 in (2014) |
| September 12 | 82.9°F (2012) | 52.0°F (2012) | 0.29 in (2022) |
| September 13 | 84.0°F (2011) | 53.1°F (2012) | 0.84 in (2013) |
| September 14 | 84.9°F (2011) | 55.9°F (2011) | 0.50 in (2025) |
| September 15 | 81.0°F (2012) | 44.1°F (2011) | 0.26 in (2011) |
| September 16 | 80.1°F (2012) | 44.1°F (2011) | 0.42 in (2014) |
| September 17 | 81.0°F (2012) | 41.0°F (2011) | 0.21 in (2016) |
| September 18 | 79.0°F (2012) | 41.0°F (2011) | 0.38 in (2017) |
| September 19 | 79.0°F (2012) | 39.9°F (2012) | 2.89 in (2015) |
| September 20 | 75.9°F (2011) | 39.0°F (2012) | 0.14 in (2013) |
| September 21 | 82.0°F (2011) | 44.1°F (2012) | 2.00 in (2014) |
| September 22 | 80.1°F (2011) | 43.0°F (2012) | 0.38 in (2012) |
| September 23 | 61.0°F (2012) | 39.0°F (2012) | 0.52 in (2019) |
| September 24 | 64.0°F (2011) | 36.0°F (2012) | 0.22 in (2024) |
| September 25 | 70.0°F (2012) | 34.0°F (2012) | 0.28 in (2024) |
| September 26 | 72.0°F (2012) | 55.0°F (2011) | 0.95 in (2011) |
| September 27 | 72.0°F (2012) | 53.1°F (2012) | 0.27 in (2012) |
| September 28 | 80.1°F (2012) | 50.0°F (2012) | 0.42 in (2019) |
| September 29 | 80.1°F (2012) | 46.9°F (2012) | 0.20 in (2011) |
| September 30 | 80.1°F (2012) | 46.0°F (2012) | 0.38 in (2019) |