December weather in Alto Pass, IL
The average temperature in Alto Pass in December is 38.9°F (29.7°F–48.0°F). Average precipitation: 4.10 inches. Average snowfall is 2.6 inches.
December is a winter month in Alto Pass, and is cooler than the annual average of 58.5°F. Daily temperatures swing about 18.3°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 25m. For travel, December is cool.
Avg High
48.0°F
Avg Low
29.7°F
Precipitation
4.10 in
Snow
2.6 in
December records in Alto Pass
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.9°F (1913) | 10.9°F (1896) | 1.81 in (1997) |
| December 2 | 75.9°F (1982) | 10.0°F (1929) | 2.12 in (1991) |
| December 3 | 73.9°F (1982) | 1.9°F (1929) | 3.52 in (1982) |
| December 4 | 72.0°F (1916) | 12.9°F (1991) | 1.07 in (1952) |
| December 5 | 69.1°F (1916) | 16.0°F (1898) | 2.46 in (2011) |
| December 6 | 71.1°F (1998) | 1.9°F (2002) | 1.48 in (2021) |
| December 7 | 72.0°F (1916) | 3.0°F (1984) | 1.14 in (1924) |
| December 8 | 68.0°F (1923) | 0.0°F (1927) | 2.30 in (1972) |
| December 9 | 72.0°F (1923) | -9.9°F (1917) | 1.69 in (1923) |
| December 10 | 69.1°F (1896) | -7.1°F (1917) | 2.72 in (1999) |
| December 11 | 73.9°F (1931) | 3.0°F (1917) | 2.01 in (1949) |
| December 12 | 69.1°F (1948) | -7.1°F (1962) | 1.34 in (1940) |
| December 13 | 66.9°F (1927) | -6.0°F (1962) | 5.15 in (1918) |
| December 14 | 68.0°F (1908) | -9.0°F (1898) | 1.88 in (2022) |
| December 15 | 71.1°F (1933) | -5.1°F (1901) | 1.78 in (1947) |
| December 16 | 72.0°F (1933) | -6.0°F (1989) | 3.23 in (1915) |
| December 17 | 72.0°F (1908) | 1.0°F (1989) | 3.42 in (2001) |
| December 18 | 70.0°F (1908) | -2.0°F (1901) | 2.64 in (2021) |
| December 19 | 64.0°F (1976) | -2.9°F (1901) | 2.85 in (2002) |
| December 20 | 64.9°F (1941) | -9.9°F (1901) | 1.85 in (1897) |
| December 21 | 69.1°F (2011) | -6.0°F (1901) | 2.65 in (1990) |
| December 22 | 64.9°F (1933) | -14.1°F (1989) | 1.96 in (1941) |
| December 23 | 69.1°F (1931) | -14.1°F (1989) | 1.64 in (1941) |
| December 24 | 66.0°F (1931) | -8.0°F (2004) | 1.96 in (1982) |
| December 25 | 66.9°F (1922) | -9.9°F (1983) | 4.43 in (1982) |
| December 26 | 73.0°F (1942) | -0.9°F (1983) | 1.09 in (2012) |
| December 27 | 72.0°F (2008) | -0.9°F (1925) | 2.22 in (1968) |
| December 28 | 69.1°F (1928) | -5.1°F (1924) | 1.72 in (1988) |
| December 29 | 70.0°F (2025) | 0.0°F (1909) | 1.81 in (1962) |
| December 30 | 70.0°F (1923) | -7.1°F (1983) | 3.65 in (1932) |
| December 31 | 73.0°F (1951) | -5.1°F (1976) | 2.07 in (1947) |