October weather in Decatur, IL
The average temperature in Decatur in October is 55.5°F (45.7°F–65.3°F). Average precipitation: 3.41 inches.
October is a fall month in Decatur, and is warmer than the annual average of 53°F. Daily temperatures swing about 19.6°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 10h 55m. For travel, October is a comfortable month to visit.
Avg High
65.3°F
Avg Low
45.7°F
Precipitation
3.41 in
Daylight
10h 55m
October records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 93.0°F (1897) | 28.9°F (1984) | 3.49 in (1927) |
| October 2 | 96.1°F (1953) | 30.0°F (1974) | 2.21 in (2014) |
| October 3 | 95.0°F (1922) | 28.0°F (1987) | 1.14 in (1973) |
| October 4 | 93.0°F (1897) | 27.0°F (1987) | 1.77 in (1941) |
| October 5 | 91.9°F (1897) | 26.1°F (1980) | 2.65 in (1941) |
| October 6 | 91.0°F (1916) | 25.0°F (1988) | 2.80 in (1955) |
| October 7 | 95.0°F (2007) | 26.1°F (1988) | 2.03 in (1990) |
| October 8 | 93.0°F (1939) | 23.0°F (1987) | 1.62 in (2009) |
| October 9 | 89.1°F (1905) | 27.0°F (1915) | 1.68 in (1990) |
| October 10 | 89.1°F (1938) | 25.0°F (1925) | 2.22 in (1959) |
| October 11 | 89.1°F (1962) | 23.0°F (1906) | 2.31 in (1954) |
| October 12 | 91.9°F (1962) | 19.9°F (1987) | 1.85 in (1901) |
| October 13 | 90.0°F (1899) | 21.9°F (1917) | 1.90 in (1969) |
| October 14 | 93.9°F (1899) | 21.9°F (1979) | 1.02 in (2003) |
| October 15 | 91.9°F (1897) | 19.9°F (1986) | 0.91 in (1966) |
| October 16 | 88.0°F (1938) | 27.0°F (1976) | 1.95 in (1957) |
| October 17 | 89.1°F (1950) | 25.0°F (1989) | 1.75 in (1923) |
| October 18 | 88.0°F (1953) | 23.0°F (1948) | 2.27 in (1923) |
| October 19 | 86.0°F (1908) | 21.0°F (1992) | 2.55 in (1938) |
| October 20 | 87.1°F (1953) | 21.0°F (1930) | 1.59 in (1983) |
| October 21 | 88.0°F (1953) | 21.0°F (1930) | 1.10 in (1949) |
| October 22 | 87.1°F (1947) | 19.0°F (1976) | 4.09 in (1983) |
| October 23 | 86.0°F (1963) | 21.9°F (1982) | 1.68 in (2009) |
| October 24 | 82.9°F (1921) | 18.0°F (1981) | 2.71 in (2021) |
| October 25 | 84.9°F (1940) | 25.0°F (1982) | 2.12 in (2022) |
| October 26 | 84.9°F (1927) | 17.1°F (1962) | 2.56 in (2019) |
| October 27 | 87.1°F (1927) | 19.9°F (1903) | 2.14 in (1899) |
| October 28 | 87.1°F (1927) | 19.0°F (1925) | 2.59 in (1961) |
| October 29 | 82.9°F (1922) | 15.1°F (1925) | 0.91 in (1955) |
| October 30 | 87.1°F (1950) | 12.0°F (1925) | 2.17 in (2009) |
| October 31 | 84.9°F (1950) | 17.1°F (1925) | 1.97 in (2013) |