September weather in Carbondale, IL
The average temperature in Carbondale in September is 68.6°F (56.0°F–81.2°F). Average precipitation: 3.44 inches.
September is a fall month in Carbondale, and is warmer than the annual average of 56°F. Daily temperatures swing about 25.2°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
81.2°F
Avg Low
56.0°F
Precipitation
3.44 in
Daylight
12h 14m
September records in Carbondale
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1953) | 43.0°F (1987) | 1.83 in (1982) |
| September 2 | 102.9°F (1913) | 39.9°F (1949) | 3.05 in (1931) |
| September 3 | 106.0°F (1925) | 44.1°F (1952) | 2.37 in (1993) |
| September 4 | 108.0°F (1925) | 39.9°F (1952) | 1.76 in (1895) |
| September 5 | 108.0°F (1925) | 41.0°F (1902) | 3.50 in (2021) |
| September 6 | 108.0°F (1925) | 39.9°F (1988) | 1.51 in (1910) |
| September 7 | 106.0°F (1925) | 37.9°F (1988) | 1.69 in (2018) |
| September 8 | 106.0°F (1939) | 39.9°F (1956) | 1.78 in (1916) |
| September 9 | 105.1°F (1939) | 39.0°F (2017) | 2.81 in (2015) |
| September 10 | 102.9°F (1912) | 41.0°F (1924) | 1.88 in (1992) |
| September 11 | 100.0°F (1925) | 36.0°F (1940) | 1.21 in (1950) |
| September 12 | 100.9°F (1939) | 36.0°F (1940) | 4.22 in (1988) |
| September 13 | 102.9°F (1939) | 33.1°F (1902) | 2.80 in (1949) |
| September 14 | 105.1°F (1939) | 32.0°F (1902) | 0.72 in (1974) |
| September 15 | 106.0°F (1939) | 32.0°F (1903) | 1.71 in (1930) |
| September 16 | 100.9°F (1927) | 37.0°F (1916) | 2.36 in (1996) |
| September 17 | 102.0°F (1927) | 37.0°F (1937) | 2.01 in (2016) |
| September 18 | 98.1°F (1925) | 33.1°F (1901) | 2.83 in (1986) |
| September 19 | 99.0°F (1940) | 30.9°F (1901) | 1.70 in (1904) |
| September 20 | 100.0°F (1940) | 35.1°F (2020) | 1.45 in (1924) |
| September 21 | 102.0°F (1940) | 32.0°F (1991) | 2.36 in (1954) |
| September 22 | 99.0°F (2022) | 32.0°F (1983) | 1.43 in (2021) |
| September 23 | 93.9°F (1939) | 30.0°F (1983) | 3.70 in (1921) |
| September 24 | 97.0°F (1935) | 30.0°F (1928) | 2.90 in (1945) |
| September 25 | 95.0°F (1920) | 32.0°F (1983) | 2.68 in (1912) |
| September 26 | 93.0°F (1920) | 30.0°F (1928) | 2.51 in (2011) |
| September 27 | 95.0°F (1953) | 30.0°F (1940) | 2.84 in (1959) |
| September 28 | 96.1°F (1939) | 32.0°F (1942) | 2.20 in (2024) |
| September 29 | 100.9°F (1953) | 30.9°F (1942) | 3.02 in (1927) |
| September 30 | 91.9°F (1919) | 19.9°F (1899) | 1.41 in (1921) |