September weather in Brookport, IL
The average temperature in Brookport in September is 70.3°F (58.6°F–82.0°F). Average precipitation: 3.49 inches.
September is a fall month in Brookport, and is warmer than the annual average of 57.3°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
82.0°F
Avg Low
58.6°F
Precipitation
3.49 in
Daylight
12h 13m
September records in Brookport
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1980) | 48.0°F (1987) | 2.55 in (1965) |
| September 2 | 97.0°F (2011) | 46.9°F (1965) | 3.00 in (2012) |
| September 3 | 98.1°F (2011) | 48.0°F (1994) | 2.73 in (1932) |
| September 4 | 99.0°F (1999) | 46.0°F (1974) | 1.20 in (1933) |
| September 5 | 99.0°F (1999) | 48.0°F (1997) | 1.47 in (1991) |
| September 6 | 96.1°F (1990) | 44.1°F (1988) | 3.55 in (1985) |
| September 7 | 96.1°F (1990) | 43.0°F (1988) | 2.02 in (1971) |
| September 8 | 98.1°F (1980) | 45.0°F (1986) | 1.94 in (2012) |
| September 9 | 99.0°F (1980) | 45.0°F (1986) | 1.58 in (1950) |
| September 10 | 97.0°F (2002) | 46.0°F (1976) | 2.30 in (1959) |
| September 11 | 91.9°F (1983) | 43.0°F (1976) | 2.05 in (2010) |
| September 12 | 98.1°F (1991) | 48.0°F (1968) | 4.30 in (1965) |
| September 13 | 97.0°F (1980) | 43.0°F (1975) | 3.05 in (1951) |
| September 14 | 93.9°F (1970) | 39.0°F (1964) | 4.26 in (1962) |
| September 15 | 99.0°F (1993) | 43.0°F (1983) | 1.83 in (2011) |
| September 16 | 93.0°F (1970) | 44.1°F (1966) | 2.20 in (1996) |
| September 17 | 93.9°F (1970) | 42.1°F (1984) | 1.37 in (1980) |
| September 18 | 90.0°F (1965) | 43.0°F (1981) | 1.63 in (2006) |
| September 19 | 93.9°F (1972) | 42.1°F (1973) | 1.70 in (2011) |
| September 20 | 91.0°F (1998) | 39.9°F (1991) | 4.35 in (1932) |
| September 21 | 97.0°F (2018) | 39.0°F (1991) | 3.45 in (1954) |
| September 22 | 96.1°F (2010) | 28.9°F (1983) | 1.72 in (1992) |
| September 23 | 93.9°F (2005) | 32.0°F (1983) | 3.88 in (2006) |
| September 24 | 93.0°F (2010) | 30.0°F (1983) | 1.75 in (1993) |
| September 25 | 91.9°F (1986) | 37.0°F (1965) | 1.54 in (2009) |
| September 26 | 90.0°F (1986) | 37.9°F (2001) | 1.08 in (2005) |
| September 27 | 93.0°F (1998) | 37.9°F (1991) | 2.00 in (2002) |
| September 28 | 93.9°F (1986) | 41.0°F (1984) | 1.85 in (1996) |
| September 29 | 93.0°F (1998) | 39.9°F (1962) | 2.37 in (1934) |
| September 30 | 93.0°F (1998) | 37.0°F (1963) | 1.02 in (1955) |