September weather in Leland Grove, IL
The average temperature in Leland Grove in September is 66.7°F (55.5°F–77.9°F). Average precipitation: 3.06 inches.
September is a fall month in Leland Grove, and is warmer than the annual average of 52.9°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.9°F
Avg Low
55.5°F
Precipitation
3.06 in
Daylight
12h 15m
September records in Leland Grove
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (2011) | 48.0°F (2009) | 4.05 in (2003) |
| September 2 | 100.0°F (2011) | 48.9°F (2009) | 1.11 in (2010) |
| September 3 | 99.0°F (2011) | 48.9°F (2009) | 2.22 in (2010) |
| September 4 | 96.1°F (2011) | 52.0°F (2009) | 0.54 in (2022) |
| September 5 | 93.9°F (2007) | 52.0°F (2010) | 2.28 in (2008) |
| September 6 | 93.0°F (2015) | 46.9°F (2011) | 0.80 in (2009) |
| September 7 | 93.0°F (2015) | 48.0°F (2011) | 0.69 in (2018) |
| September 8 | 91.9°F (2015) | 46.9°F (2011) | 2.18 in (2018) |
| September 9 | 90.0°F (2005) | 51.1°F (2004) | 1.22 in (2015) |
| September 10 | 93.0°F (2013) | 46.9°F (2008) | 1.52 in (2014) |
| September 11 | 93.9°F (2013) | 48.0°F (2008) | 1.39 in (2015) |
| September 12 | 91.9°F (2013) | 45.0°F (2007) | 1.82 in (2006) |
| September 13 | 91.0°F (2005) | 39.9°F (2014) | 1.09 in (2020) |
| September 14 | 91.9°F (2005) | 39.9°F (2014) | 1.35 in (2008) |
| September 15 | 84.0°F (2004) | 37.0°F (2007) | 1.62 in (2008) |
| September 16 | 82.9°F (2004) | 37.9°F (2007) | 0.90 in (2014) |
| September 17 | 84.0°F (2006) | 46.9°F (2014) | 0.31 in (2016) |
| September 18 | 88.0°F (2007) | 46.0°F (2014) | 0.18 in (2006) |
| September 19 | 90.0°F (2007) | 44.1°F (2012) | 2.24 in (2022) |
| September 20 | 91.9°F (2005) | 39.9°F (2006) | 1.26 in (2005) |
| September 21 | 90.0°F (2016) | 39.9°F (2006) | 1.98 in (2009) |
| September 22 | 89.1°F (2007) | 46.0°F (2013) | 0.58 in (2010) |
| September 23 | 93.0°F (2005) | 37.9°F (2012) | 1.14 in (2023) |
| September 24 | 91.9°F (2007) | 36.0°F (2012) | 0.57 in (2005) |
| September 25 | 91.9°F (2007) | 36.0°F (2012) | 0.38 in (2012) |
| September 26 | 89.1°F (2016) | 46.0°F (2006) | 0.58 in (2005) |
| September 27 | 82.0°F (2013) | 45.0°F (2004) | 0.68 in (2011) |
| September 28 | 82.9°F (2014) | 44.1°F (2010) | 0.87 in (2019) |
| September 29 | 82.9°F (2013) | 42.1°F (2004) | 3.28 in (2019) |
| September 30 | 82.9°F (2007) | 39.0°F (2006) | 0.60 in (2008) |