September weather in Mendota, IL
The average temperature in Mendota in September is °F (°F–°F). Average precipitation: 3.29 inches.
September is a fall month in Mendota, and is cooler than the annual average of 0°F. Expect about 8 days with precipitation. Daylight averages about 12h 16m.
Avg High
°F
Avg Low
°F
Precipitation
3.29 in
Daylight
12h 16m
September records in Mendota
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | — | — | 0.79 in (2003) |
| September 2 | — | — | 0.39 in (2012) |
| September 3 | — | — | 1.43 in (2010) |
| September 4 | — | — | 0.93 in (2006) |
| September 5 | — | — | 2.34 in (2008) |
| September 6 | — | — | 1.48 in (2020) |
| September 7 | — | — | 0.44 in (2001) |
| September 8 | — | — | 2.23 in (2016) |
| September 9 | — | — | 1.33 in (2008) |
| September 10 | — | — | 1.44 in (2014) |
| September 11 | — | — | 1.74 in (2014) |
| September 12 | — | — | 1.11 in (2022) |
| September 13 | — | — | 2.52 in (2008) |
| September 14 | — | — | 3.14 in (2008) |
| September 15 | — | — | 1.78 in (2019) |
| September 16 | — | — | 1.00 in (2004) |
| September 17 | — | — | 0.26 in (2023) |
| September 18 | — | — | 0.43 in (2012) |
| September 19 | — | — | 3.66 in (2015) |
| September 20 | — | — | 0.47 in (2013) |
| September 21 | — | — | 0.76 in (2009) |
| September 22 | — | — | 1.18 in (2016) |
| September 23 | — | — | 1.01 in (2019) |
| September 24 | — | — | 0.37 in (2001) |
| September 25 | — | — | 0.62 in (2024) |
| September 26 | — | — | 0.49 in (2011) |
| September 27 | — | — | 1.44 in (2011) |
| September 28 | — | — | 2.77 in (2019) |
| September 29 | — | — | 0.35 in (2005) |
| September 30 | — | — | 0.45 in (2008) |