September weather in Warrenville, IL
The average temperature in Warrenville in September is 65.9°F (53.8°F–78.0°F). Average precipitation: 3.30 inches.
September is a fall month in Warrenville, and is warmer than the annual average of 51.1°F. Daily temperatures swing about 24.2°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
78.0°F
Avg Low
53.8°F
Precipitation
3.30 in
Daylight
12h 16m
September records in Warrenville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1953) | 39.0°F (1967) | 2.63 in (1989) |
| September 2 | 99.0°F (1953) | 39.0°F (1946) | 0.88 in (1961) |
| September 3 | 99.0°F (1944) | 41.0°F (1946) | 0.82 in (1970) |
| September 4 | 95.0°F (1960) | 39.0°F (1963) | 1.55 in (1965) |
| September 5 | 95.0°F (1999) | 37.9°F (1974) | 1.88 in (1941) |
| September 6 | 96.1°F (1990) | 41.0°F (1988) | 1.04 in (1944) |
| September 7 | 100.9°F (1939) | 39.9°F (1956) | 3.35 in (1998) |
| September 8 | 97.0°F (1978) | 37.9°F (1986) | 2.02 in (1980) |
| September 9 | 95.0°F (1978) | 39.9°F (1975) | 1.39 in (1941) |
| September 10 | 93.9°F (1978) | 39.9°F (1969) | 2.56 in (1992) |
| September 11 | 91.9°F (1978) | 39.0°F (1993) | 1.00 in (1947) |
| September 12 | 96.1°F (1939) | 39.9°F (1955) | 2.44 in (1936) |
| September 13 | 99.0°F (1939) | 33.1°F (1975) | 2.84 in (1936) |
| September 14 | 100.9°F (1939) | 34.0°F (1975) | 3.12 in (1961) |
| September 15 | 102.0°F (1939) | 37.0°F (1996) | 0.98 in (1992) |
| September 16 | 93.0°F (1955) | 35.1°F (1984) | 1.77 in (1936) |
| September 17 | 91.0°F (1988) | 37.0°F (1984) | 1.45 in (1980) |
| September 18 | 90.0°F (1895) | 36.0°F (1959) | 0.73 in (1899) |
| September 19 | 91.9°F (1895) | 37.9°F (1973) | 1.76 in (1950) |
| September 20 | 91.9°F (1940) | 30.9°F (1956) | 2.25 in (1945) |
| September 21 | 97.0°F (1940) | 35.1°F (1971) | 2.75 in (1947) |
| September 22 | 97.0°F (1940) | 30.0°F (1976) | 1.95 in (1965) |
| September 23 | 90.0°F (1937) | 27.0°F (1974) | 1.54 in (1961) |
| September 24 | 86.0°F (1984) | 28.0°F (1995) | 1.24 in (2001) |
| September 25 | 89.1°F (1986) | 28.9°F (1942) | 2.04 in (1941) |
| September 26 | 91.9°F (1998) | 32.0°F (1942) | 2.20 in (1951) |
| September 27 | 91.9°F (1998) | 30.9°F (1991) | 2.88 in (1986) |
| September 28 | 88.0°F (1939) | 26.1°F (1942) | 1.46 in (1999) |
| September 29 | 96.1°F (1953) | 28.9°F (1942) | 2.63 in (1972) |
| September 30 | 91.9°F (1953) | 28.0°F (2006) | 1.98 in (1986) |