October weather in River Forest, IL
The average temperature in River Forest in October is 54.0°F (45.4°F–62.7°F). Average precipitation: 3.43 inches. Average snowfall is 0.2 inches.
October is a fall month in River Forest, and is warmer than the annual average of 51.3°F. Daily temperatures swing about 17.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 10h 50m. For travel, October is a comfortable month to visit.
Avg High
62.7°F
Avg Low
45.4°F
Precipitation
3.43 in
Snow
0.2 in
October records in River Forest
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 90.0°F (1971) | 33.1°F (1974) | 1.56 in (2018) |
| October 2 | 89.1°F (1971) | 27.0°F (1974) | 1.76 in (2019) |
| October 3 | 89.1°F (2025) | 28.0°F (1974) | 1.78 in (1986) |
| October 4 | 88.0°F (2025) | 32.0°F (1980) | 2.57 in (1991) |
| October 5 | 88.0°F (1997) | 28.0°F (1980) | 1.32 in (1959) |
| October 6 | 91.0°F (1963) | 25.0°F (1964) | 1.04 in (1995) |
| October 7 | 87.1°F (2007) | 24.1°F (1964) | 0.95 in (2025) |
| October 8 | 88.0°F (1997) | 27.0°F (1987) | 1.15 in (1990) |
| October 9 | 86.0°F (2010) | 24.1°F (1964) | 0.69 in (1982) |
| October 10 | 87.1°F (1962) | 19.9°F (1964) | 4.25 in (1969) |
| October 11 | 88.0°F (1962) | 24.1°F (1964) | 1.17 in (1972) |
| October 12 | 84.0°F (2008) | 28.0°F (1967) | 0.94 in (1973) |
| October 13 | 87.1°F (1975) | 25.0°F (1988) | 3.79 in (2001) |
| October 14 | 86.0°F (1962) | 28.9°F (1963) | 4.19 in (2017) |
| October 15 | 87.1°F (1962) | 30.9°F (1972) | 0.93 in (1967) |
| October 16 | 84.9°F (1963) | 28.0°F (1991) | 0.50 in (2006) |
| October 17 | 82.0°F (1965) | 28.0°F (1992) | 3.61 in (1988) |
| October 18 | 80.1°F (1965) | 25.0°F (1992) | 2.09 in (1985) |
| October 19 | 82.9°F (1971) | 21.0°F (1992) | 1.49 in (1961) |
| October 20 | 84.9°F (2003) | 23.0°F (1964) | 0.98 in (1993) |
| October 21 | 84.0°F (1979) | 27.0°F (1960) | 0.71 in (1965) |
| October 22 | 84.0°F (1963) | 21.9°F (1982) | 2.81 in (1983) |
| October 23 | 84.9°F (1963) | 19.9°F (1981) | 1.17 in (2004) |
| October 24 | 82.9°F (2023) | 17.1°F (1981) | 1.85 in (2021) |
| October 25 | 77.0°F (1963) | 21.0°F (1962) | 1.04 in (1991) |
| October 26 | 82.9°F (1963) | 19.0°F (1962) | 2.18 in (2019) |
| October 27 | 77.0°F (2014) | 23.0°F (1976) | 0.49 in (2015) |
| October 28 | 80.1°F (1999) | 21.9°F (1976) | 0.53 in (1970) |
| October 29 | 82.0°F (2024) | 21.9°F (1965) | 1.00 in (1996) |
| October 30 | 80.1°F (1971) | 21.0°F (1988) | 0.99 in (1967) |
| October 31 | 79.0°F (1968) | 25.0°F (1993) | 2.26 in (1994) |