September weather in Hillcrest, IL
The average temperature in Hillcrest in September is 63.4°F (51.8°F–75.0°F). Average precipitation: 3.26 inches.
September is a fall month in Hillcrest, and is warmer than the annual average of 47.9°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
75.0°F
Avg Low
51.8°F
Precipitation
3.26 in
Daylight
12h 16m
September records in Hillcrest
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (1984) | 43.0°F (2009) | 2.08 in (1989) |
| September 2 | 93.0°F (2000) | 39.9°F (2017) | 0.55 in (2018) |
| September 3 | 91.9°F (1999) | 37.9°F (2017) | 1.45 in (2018) |
| September 4 | 91.9°F (2012) | 39.0°F (1997) | 2.20 in (2019) |
| September 5 | 91.9°F (2012) | 37.9°F (1997) | 1.88 in (2008) |
| September 6 | 90.0°F (1985) | 32.0°F (1986) | 0.71 in (1989) |
| September 7 | 93.9°F (1985) | 34.0°F (1986) | 0.80 in (1980) |
| September 8 | 91.9°F (1985) | 39.9°F (1986) | 1.05 in (1992) |
| September 9 | 93.9°F (2002) | 42.1°F (1979) | 1.14 in (2015) |
| September 10 | 93.9°F (2002) | 41.0°F (2008) | 2.16 in (1992) |
| September 11 | 93.0°F (2013) | 37.0°F (1985) | 1.28 in (1991) |
| September 12 | 91.0°F (2000) | 34.0°F (1985) | 1.65 in (2000) |
| September 13 | 90.0°F (2005) | 36.0°F (2014) | 3.60 in (2008) |
| September 14 | 91.0°F (1998) | 37.0°F (2014) | 1.81 in (2008) |
| September 15 | 88.0°F (1991) | 30.9°F (1984) | 1.40 in (1998) |
| September 16 | 84.9°F (2017) | 32.0°F (2007) | 0.94 in (2013) |
| September 17 | 88.0°F (2018) | 30.9°F (1999) | 1.36 in (1983) |
| September 18 | 93.0°F (1988) | 35.1°F (1991) | 1.00 in (2012) |
| September 19 | 89.1°F (2000) | 30.0°F (1991) | 1.49 in (2001) |
| September 20 | 88.0°F (2013) | 33.1°F (1991) | 0.82 in (1983) |
| September 21 | 91.0°F (2017) | 32.0°F (1983) | 0.90 in (2000) |
| September 22 | 89.1°F (2017) | 30.0°F (1983) | 1.51 in (2016) |
| September 23 | 91.9°F (2017) | 28.0°F (1985) | 0.90 in (2000) |
| September 24 | 93.0°F (2017) | 30.9°F (1985) | 0.96 in (1986) |
| September 25 | 90.0°F (2007) | 28.9°F (1984) | 0.95 in (2005) |
| September 26 | 91.0°F (2017) | 30.0°F (1984) | 1.75 in (1993) |
| September 27 | 91.0°F (2017) | 30.9°F (1984) | 2.38 in (2011) |
| September 28 | 84.9°F (1990) | 25.0°F (1984) | 3.30 in (1999) |
| September 29 | 81.0°F (1983) | 24.1°F (1984) | 1.13 in (1981) |
| September 30 | 88.0°F (2002) | 26.1°F (1984) | 1.10 in (2008) |