September weather in Louisville, IL
The average temperature in Louisville in September is 69.0°F (56.9°F–81.2°F). Average precipitation: 3.27 inches.
September is a fall month in Louisville, and is warmer than the annual average of 56.1°F. Daily temperatures swing about 24.3°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
81.2°F
Avg Low
56.9°F
Precipitation
3.27 in
Daylight
12h 14m
September records in Louisville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (1953) | 44.1°F (1967) | 3.55 in (1931) |
| September 2 | 104.0°F (1953) | 45.0°F (1919) | 1.85 in (1950) |
| September 3 | 104.0°F (1913) | 42.1°F (1908) | 2.75 in (1993) |
| September 4 | 102.9°F (1954) | 42.1°F (1974) | 1.60 in (1918) |
| September 5 | 104.0°F (1925) | 43.0°F (1997) | 2.88 in (1911) |
| September 6 | 107.1°F (1925) | 39.9°F (1988) | 2.01 in (1914) |
| September 7 | 102.0°F (1925) | 37.9°F (1988) | 1.65 in (1910) |
| September 8 | 100.0°F (1925) | 37.0°F (1986) | 1.82 in (1973) |
| September 9 | 104.0°F (1925) | 42.1°F (1986) | 3.37 in (1909) |
| September 10 | 100.0°F (1933) | 37.0°F (1924) | 1.10 in (1922) |
| September 11 | 99.0°F (1908) | 42.1°F (1940) | 2.49 in (1975) |
| September 12 | 99.0°F (1936) | 41.0°F (1968) | 2.40 in (1974) |
| September 13 | 100.0°F (1936) | 37.0°F (1902) | 2.51 in (1943) |
| September 14 | 99.0°F (1939) | 35.1°F (1902) | 1.73 in (1989) |
| September 15 | 99.0°F (1927) | 30.0°F (1902) | 1.42 in (1930) |
| September 16 | 98.1°F (1927) | 37.9°F (1966) | 2.25 in (1911) |
| September 17 | 99.0°F (1927) | 36.0°F (1937) | 1.47 in (1969) |
| September 18 | 100.0°F (1925) | 30.0°F (2000) | 1.50 in (1967) |
| September 19 | 100.0°F (1925) | 33.1°F (1901) | 2.21 in (1966) |
| September 20 | 96.1°F (1908) | 32.0°F (1991) | 2.44 in (1954) |
| September 21 | 97.0°F (1955) | 34.0°F (1962) | 1.69 in (1947) |
| September 22 | 96.1°F (1936) | 33.1°F (1983) | 2.36 in (1992) |
| September 23 | 99.0°F (2007) | 28.9°F (1995) | 2.35 in (1984) |
| September 24 | 93.9°F (2007) | 30.0°F (1983) | 1.29 in (1977) |
| September 25 | 95.0°F (1908) | 34.0°F (1950) | 2.49 in (2000) |
| September 26 | 93.9°F (1897) | 30.9°F (1928) | 1.70 in (2003) |
| September 27 | 91.0°F (1911) | 33.1°F (1942) | 2.84 in (1904) |
| September 28 | 96.1°F (1953) | 27.0°F (1942) | 1.46 in (1945) |
| September 29 | 100.9°F (1953) | 30.0°F (1942) | 1.47 in (1927) |
| September 30 | 93.0°F (1952) | 25.0°F (1899) | 2.18 in (1926) |