October weather in Alton, IL
The average temperature in Alton in October is 57.9°F (48.0°F–67.9°F). Average precipitation: 2.93 inches.
October is a fall month in Alton, and is warmer than the annual average of 55.7°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 10h 57m. For travel, October is a comfortable month to visit.
Avg High
67.9°F
Avg Low
48.0°F
Precipitation
2.93 in
Daylight
10h 57m
October records in Alton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 90.0°F (1971) | 35.1°F (1985) | 1.49 in (1962) |
| October 2 | 93.0°F (1953) | 30.9°F (1985) | 1.80 in (2014) |
| October 3 | 95.0°F (2006) | 30.9°F (1985) | 1.97 in (2002) |
| October 4 | 97.0°F (2006) | 37.0°F (1985) | 3.50 in (1986) |
| October 5 | 91.9°F (2006) | 34.0°F (1980) | 1.60 in (1991) |
| October 6 | 89.1°F (1946) | 32.0°F (1952) | 1.73 in (1959) |
| October 7 | 89.1°F (1963) | 28.0°F (1952) | 1.35 in (1990) |
| October 8 | 88.0°F (2007) | 30.0°F (1952) | 2.35 in (1977) |
| October 9 | 87.1°F (1980) | 35.1°F (1945) | 1.04 in (1990) |
| October 10 | 90.0°F (1963) | 33.1°F (1964) | 1.75 in (2003) |
| October 11 | 90.0°F (1963) | 34.0°F (1952) | 1.53 in (1949) |
| October 12 | 90.0°F (1947) | 35.1°F (1980) | 2.55 in (1969) |
| October 13 | 87.1°F (1952) | 33.1°F (1979) | 0.98 in (1962) |
| October 14 | 89.1°F (1947) | 32.0°F (1979) | 1.00 in (1974) |
| October 15 | 88.0°F (1963) | 34.0°F (1955) | 1.24 in (1966) |
| October 16 | 90.0°F (1950) | 32.0°F (1943) | 1.12 in (1967) |
| October 17 | 91.9°F (1950) | 28.9°F (1976) | 1.80 in (2006) |
| October 18 | 88.0°F (1945) | 28.0°F (1948) | 1.47 in (1946) |
| October 19 | 88.0°F (1950) | 28.0°F (1972) | 2.20 in (2025) |
| October 20 | 87.1°F (1947) | 27.0°F (1972) | 2.53 in (2016) |
| October 21 | 87.1°F (1947) | 25.0°F (1952) | 1.10 in (1984) |
| October 22 | 87.1°F (1947) | 25.0°F (1976) | 0.64 in (1996) |
| October 23 | 82.9°F (1963) | 28.0°F (1976) | 1.41 in (1957) |
| October 24 | 82.9°F (1952) | 25.0°F (1981) | 2.40 in (1976) |
| October 25 | 82.9°F (1952) | 28.0°F (1981) | 1.05 in (1947) |
| October 26 | 82.0°F (1952) | 28.9°F (1980) | 1.66 in (2022) |
| October 27 | 84.0°F (1945) | 30.0°F (1949) | 1.43 in (2019) |
| October 28 | 91.9°F (1945) | 25.0°F (1976) | 0.99 in (2006) |
| October 29 | 98.1°F (1945) | 26.1°F (1976) | 1.36 in (1955) |
| October 30 | 86.0°F (1950) | 26.1°F (1980) | 1.12 in (2019) |
| October 31 | 81.0°F (1944) | 28.0°F (1949) | 1.25 in (2013) |