September weather in Dowell, IL
The average temperature in Dowell in September is 68.3°F (56.6°F–80.0°F). Average precipitation: 3.40 inches.
September is a fall month in Dowell, and is warmer than the annual average of 56°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
80.0°F
Avg Low
56.6°F
Precipitation
3.40 in
Daylight
12h 14m
September records in Dowell
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1953) | 46.9°F (1915) | 3.64 in (2012) |
| September 2 | 102.0°F (1913) | 46.0°F (1949) | 3.04 in (1931) |
| September 3 | 105.1°F (1925) | 46.0°F (1924) | 2.49 in (1932) |
| September 4 | 106.0°F (1925) | 44.1°F (1928) | 1.43 in (1895) |
| September 5 | 107.1°F (1925) | 43.0°F (1902) | 2.10 in (1948) |
| September 6 | 108.0°F (1925) | 43.0°F (1924) | 1.28 in (2009) |
| September 7 | 104.0°F (1899) | 41.0°F (1988) | 1.59 in (1911) |
| September 8 | 105.1°F (1925) | 42.1°F (1944) | 4.10 in (2018) |
| September 9 | 105.1°F (1925) | 44.1°F (1943) | 2.39 in (1974) |
| September 10 | 102.0°F (1919) | 41.0°F (1924) | 1.75 in (1951) |
| September 11 | 98.1°F (1925) | 36.0°F (1940) | 2.91 in (1965) |
| September 12 | 100.0°F (1939) | 37.0°F (1940) | 1.78 in (1913) |
| September 13 | 102.9°F (1939) | 34.0°F (1902) | 3.16 in (1949) |
| September 14 | 104.0°F (1939) | 34.0°F (1902) | 2.00 in (2016) |
| September 15 | 104.0°F (1939) | 37.9°F (1902) | 1.94 in (1934) |
| September 16 | 99.0°F (1927) | 36.0°F (1916) | 2.30 in (1905) |
| September 17 | 100.0°F (1931) | 37.9°F (1937) | 1.24 in (1911) |
| September 18 | 100.0°F (1925) | 35.1°F (1901) | 2.74 in (1986) |
| September 19 | 99.0°F (1925) | 32.0°F (1901) | 2.56 in (1977) |
| September 20 | 98.1°F (1940) | 37.0°F (1918) | 1.64 in (2005) |
| September 21 | 100.0°F (1940) | 34.0°F (1918) | 1.92 in (1909) |
| September 22 | 99.0°F (1940) | 33.1°F (1983) | 1.58 in (1909) |
| September 23 | 93.9°F (1941) | 30.9°F (1983) | 4.56 in (1993) |
| September 24 | 96.1°F (1935) | 30.0°F (1927) | 1.27 in (1951) |
| September 25 | 95.0°F (1939) | 37.0°F (1965) | 2.95 in (2005) |
| September 26 | 96.1°F (1900) | 30.0°F (1928) | 1.67 in (1959) |
| September 27 | 93.9°F (1911) | 34.0°F (1899) | 3.00 in (2024) |
| September 28 | 97.0°F (1939) | 28.0°F (1942) | 1.73 in (1916) |
| September 29 | 91.9°F (1923) | 27.0°F (1899) | 2.00 in (2015) |
| September 30 | 93.9°F (1971) | 33.1°F (1924) | 1.32 in (1926) |