September weather in Hebron, IL
The average temperature in Hebron in September is 61.7°F (50.2°F–73.2°F). Average precipitation: 3.64 inches.
September is a fall month in Hebron, and is warmer than the annual average of 47°F. Daily temperatures swing about 23°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
73.2°F
Avg Low
50.2°F
Precipitation
3.64 in
Daylight
12h 16m
September records in Hebron
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (2012) | 41.0°F (2025) | 0.40 in (2019) |
| September 2 | 90.0°F (2011) | 39.0°F (2017) | 1.06 in (2018) |
| September 3 | 88.0°F (2011) | 45.0°F (2024) | 1.40 in (2018) |
| September 4 | 90.0°F (2023) | 39.9°F (2025) | 1.68 in (2008) |
| September 5 | 91.9°F (2012) | 39.0°F (2025) | 1.30 in (2008) |
| September 6 | 87.1°F (2012) | 41.0°F (2025) | 0.47 in (2007) |
| September 7 | 90.0°F (2016) | 37.0°F (2025) | 0.18 in (2020) |
| September 8 | 86.0°F (2013) | 35.1°F (2025) | 1.76 in (2016) |
| September 9 | 82.0°F (2016) | 39.9°F (2024) | 1.03 in (2020) |
| September 10 | 89.1°F (2013) | 37.9°F (2017) | 1.58 in (2019) |
| September 11 | 93.0°F (2013) | 37.9°F (2017) | 0.36 in (2010) |
| September 12 | 84.9°F (2021) | 37.9°F (2017) | 4.47 in (2022) |
| September 13 | 87.1°F (2012) | 37.9°F (2014) | 3.02 in (2019) |
| September 14 | 84.0°F (2024) | 37.9°F (2013) | 1.38 in (2025) |
| September 15 | 87.1°F (2024) | 35.1°F (2011) | 0.59 in (2008) |
| September 16 | 86.0°F (2017) | 37.9°F (2011) | 0.27 in (2013) |
| September 17 | 88.0°F (2024) | 36.0°F (2014) | 0.94 in (2010) |
| September 18 | 89.1°F (2018) | 36.0°F (2014) | 2.56 in (2015) |
| September 19 | 84.0°F (2024) | 33.1°F (2012) | 0.65 in (2015) |
| September 20 | 88.0°F (2021) | 34.0°F (2012) | 1.14 in (2023) |
| September 21 | 91.0°F (2017) | 34.0°F (2012) | 0.92 in (2009) |
| September 22 | 93.0°F (2017) | 35.1°F (2014) | 0.47 in (2019) |
| September 23 | 93.9°F (2017) | 34.0°F (2012) | 1.36 in (2024) |
| September 24 | 93.0°F (2017) | 32.0°F (2012) | 0.23 in (2024) |
| September 25 | 91.0°F (2017) | 32.0°F (2012) | 0.68 in (2011) |
| September 26 | 91.9°F (2017) | 42.1°F (2013) | 1.40 in (2011) |
| September 27 | 89.1°F (2017) | 36.0°F (2012) | 0.92 in (2023) |
| September 28 | 84.9°F (2021) | 37.0°F (2010) | 0.84 in (2011) |
| September 29 | 82.0°F (2013) | 30.9°F (2018) | 0.54 in (2019) |
| September 30 | 87.1°F (2025) | 30.9°F (2022) | 0.30 in (2007) |