October weather in Mount Vernon, IL
The average temperature in Mount Vernon in October is 56.1°F (44.7°F–67.5°F). Average precipitation: 3.53 inches. Average snowfall is 0.2 inches.
October is a fall month in Mount Vernon, and is warmer than the annual average of 54.5°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 10h 59m. For travel, October is a comfortable month to visit.
Avg High
67.5°F
Avg Low
44.7°F
Precipitation
3.53 in
Snow
0.2 in
October records in Mount Vernon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 93.9°F (2019) | 32.0°F (1924) | 2.48 in (1926) |
| October 2 | 95.0°F (1953) | 28.9°F (1985) | 1.05 in (1911) |
| October 3 | 93.0°F (1922) | 30.0°F (1981) | 3.35 in (2014) |
| October 4 | 93.9°F (1922) | 28.9°F (1987) | 4.18 in (1910) |
| October 5 | 96.1°F (1938) | 27.1°F (2020) | 1.84 in (1949) |
| October 6 | 91.9°F (1941) | 30.0°F (1985) | 1.95 in (1949) |
| October 7 | 93.9°F (1939) | 27.0°F (1935) | 1.53 in (1922) |
| October 8 | 93.9°F (1939) | 26.1°F (1987) | 1.21 in (2008) |
| October 9 | 93.0°F (1938) | 26.1°F (2000) | 3.25 in (2009) |
| October 10 | 90.0°F (1938) | 24.1°F (1906) | 2.70 in (1914) |
| October 11 | 93.9°F (1963) | 28.0°F (1917) | 2.66 in (1983) |
| October 12 | 88.0°F (1963) | 26.1°F (1987) | 2.05 in (1901) |
| October 13 | 91.9°F (1940) | 21.9°F (1917) | 2.02 in (1973) |
| October 14 | 90.0°F (1899) | 24.1°F (1979) | 2.80 in (2001) |
| October 15 | 90.0°F (1938) | 27.0°F (2006) | 1.22 in (1928) |
| October 16 | 89.1°F (1938) | 27.0°F (1991) | 2.54 in (1928) |
| October 17 | 90.0°F (1938) | 26.1°F (1943) | 2.32 in (2006) |
| October 18 | 90.0°F (1938) | 19.9°F (1948) | 2.35 in (1905) |
| October 19 | 89.1°F (1953) | 24.1°F (1992) | 1.28 in (2020) |
| October 20 | 91.9°F (1963) | 22.1°F (2022) | 2.41 in (2016) |
| October 21 | 88.0°F (1963) | 21.9°F (1952) | 2.58 in (1984) |
| October 22 | 88.0°F (1920) | 23.0°F (1976) | 1.12 in (1983) |
| October 23 | 88.0°F (1939) | 25.0°F (1976) | 2.59 in (1951) |
| October 24 | 87.1°F (1940) | 18.0°F (1981) | 1.65 in (2008) |
| October 25 | 88.0°F (1940) | 21.9°F (2013) | 1.78 in (1934) |
| October 26 | 88.0°F (1940) | 21.0°F (1942) | 4.36 in (1919) |
| October 27 | 89.1°F (1940) | 21.9°F (1982) | 4.04 in (1919) |
| October 28 | 89.1°F (1927) | 23.0°F (1976) | 1.29 in (2015) |
| October 29 | 84.9°F (1946) | 21.0°F (1925) | 1.82 in (1926) |
| October 30 | 86.0°F (1950) | 21.9°F (1925) | 1.48 in (1942) |
| October 31 | 84.9°F (1933) | 21.0°F (1923) | 2.06 in (1932) |