September weather in Richton Park, IL
The average temperature in Richton Park in September is 65.2°F (54.6°F–75.8°F). Average precipitation: 3.44 inches.
September is a fall month in Richton Park, and is warmer than the annual average of 49.8°F. Daily temperatures swing about 21.2°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
75.8°F
Avg Low
54.6°F
Precipitation
3.44 in
Daylight
12h 16m
September records in Richton Park
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1953) | 44.1°F (1967) | 2.00 in (1980) |
| September 2 | 99.0°F (1953) | 44.1°F (1955) | 0.97 in (1977) |
| September 3 | 95.0°F (1953) | 42.1°F (1974) | 1.78 in (2010) |
| September 4 | 95.0°F (1960) | 44.1°F (1974) | 1.27 in (2018) |
| September 5 | 97.0°F (1954) | 42.1°F (1974) | 3.00 in (2008) |
| September 6 | 96.1°F (1954) | 39.0°F (1988) | 2.53 in (2023) |
| September 7 | 97.0°F (1960) | 39.9°F (1986) | 2.06 in (1998) |
| September 8 | 95.0°F (1960) | 39.0°F (1986) | 0.72 in (1980) |
| September 9 | 95.0°F (1978) | 44.1°F (1986) | 1.70 in (1965) |
| September 10 | 95.0°F (1983) | 43.0°F (1969) | 2.75 in (1992) |
| September 11 | 95.0°F (2013) | 42.1°F (1993) | 0.71 in (2014) |
| September 12 | 93.0°F (2013) | 39.9°F (1955) | 2.12 in (2000) |
| September 13 | 93.9°F (1956) | 35.1°F (1953) | 4.04 in (2008) |
| September 14 | 91.9°F (2005) | 39.0°F (1963) | 2.75 in (2008) |
| September 15 | 90.0°F (1991) | 39.9°F (2007) | 1.84 in (1970) |
| September 16 | 90.0°F (1991) | 37.0°F (1984) | 1.31 in (2004) |
| September 17 | 90.0°F (1955) | 43.0°F (1959) | 1.80 in (1980) |
| September 18 | 93.0°F (1953) | 37.9°F (1959) | 2.00 in (1977) |
| September 19 | 91.9°F (1955) | 37.0°F (1991) | 1.71 in (1983) |
| September 20 | 91.9°F (1978) | 37.9°F (1952) | 1.82 in (1964) |
| September 21 | 93.9°F (2018) | 37.9°F (1952) | 0.98 in (1961) |
| September 22 | 91.9°F (1956) | 35.1°F (1974) | 1.53 in (1965) |
| September 23 | 93.0°F (2017) | 28.9°F (1995) | 3.19 in (1961) |
| September 24 | 93.9°F (2017) | 35.1°F (1976) | 0.88 in (1959) |
| September 25 | 91.9°F (2017) | 37.0°F (2012) | 1.94 in (1961) |
| September 26 | 91.0°F (2017) | 37.0°F (1984) | 1.42 in (1959) |
| September 27 | 91.0°F (1998) | 32.0°F (1991) | 2.10 in (1996) |
| September 28 | 91.0°F (1953) | 37.0°F (1961) | 4.70 in (2019) |
| September 29 | 98.1°F (1953) | 33.1°F (1984) | 0.95 in (2019) |
| September 30 | 89.1°F (1953) | 30.9°F (1984) | 1.13 in (1986) |