September weather in Mansfield, IL
The average temperature in Mansfield in September is °F (°F–°F). Average precipitation: 3.50 inches.
September is a fall month in Mansfield, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 15m.
Avg High
°F
Avg Low
°F
Precipitation
3.50 in
Daylight
12h 15m
September records in Mansfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2011) | 71.1°F (2011) | 0.69 in (2012) |
| September 2 | 102.0°F (2011) | 73.0°F (2011) | 4.16 in (2012) |
| September 3 | 96.1°F (2011) | 73.0°F (2011) | 1.70 in (2010) |
| September 4 | 95.0°F (2011) | 68.0°F (2011) | 0.23 in (2025) |
| September 5 | 75.0°F (2011) | 53.1°F (2011) | 3.40 in (2008) |
| September 6 | 75.0°F (2011) | 44.1°F (2011) | 0.90 in (2014) |
| September 7 | 75.0°F (2011) | 43.0°F (2011) | 1.51 in (2018) |
| September 8 | 78.1°F (2011) | 48.9°F (2011) | 2.48 in (2018) |
| September 9 | 78.1°F (2011) | 52.0°F (2011) | 0.91 in (2016) |
| September 10 | 72.0°F (2011) | 61.0°F (2011) | 1.44 in (2000) |
| September 11 | 75.0°F (2011) | 57.9°F (2011) | 1.61 in (2014) |
| September 12 | 81.0°F (2011) | 57.9°F (2011) | 1.11 in (2006) |
| September 13 | 84.9°F (2011) | 59.0°F (2011) | 0.49 in (2020) |
| September 14 | 82.9°F (2011) | 57.9°F (2011) | 1.28 in (2008) |
| September 15 | 66.0°F (2011) | 41.0°F (2011) | 5.02 in (2008) |
| September 16 | 62.1°F (2011) | 42.1°F (2011) | 1.20 in (2005) |
| September 17 | 62.1°F (2011) | 48.0°F (2011) | 0.52 in (2002) |
| September 18 | 70.0°F (2011) | 53.1°F (2011) | 0.90 in (2015) |
| September 19 | 66.9°F (2011) | 59.0°F (2011) | 1.47 in (2022) |
| September 20 | 69.1°F (2011) | 51.1°F (2011) | 1.24 in (1998) |
| September 21 | 75.9°F (2011) | 52.0°F (2011) | 0.90 in (2014) |
| September 22 | 73.9°F (2011) | 51.1°F (2011) | 1.62 in (2023) |
| September 23 | 68.0°F (2011) | 45.0°F (2011) | 0.61 in (2003) |
| September 24 | 66.0°F (2011) | 45.0°F (2011) | 0.63 in (1998) |
| September 25 | 64.9°F (2011) | 50.0°F (2011) | 0.45 in (2000) |
| September 26 | 66.9°F (2011) | 50.0°F (2011) | 1.35 in (2003) |
| September 27 | 63.0°F (2011) | 48.9°F (2011) | 0.97 in (2011) |
| September 28 | 60.1°F (2011) | 52.0°F (2011) | 1.70 in (1999) |
| September 29 | 68.0°F (2011) | 48.9°F (2011) | 1.09 in (2019) |
| September 30 | 75.9°F (2011) | 48.9°F (2011) | 0.72 in (2019) |