December weather in Galena, MO
The average temperature in Galena in December is 36.4°F (25.5°F–47.3°F). Average precipitation: 2.74 inches. Average snowfall is 0.8 inches.
December is a winter month in Galena, and is cooler than the annual average of 56.2°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 9h 29m. For travel, December is cool.
Avg High
47.3°F
Avg Low
25.5°F
Precipitation
2.74 in
Snow
0.8 in
December records in Galena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.9°F (1982) | 14.0°F (1975) | 1.22 in (2006) |
| December 2 | 73.0°F (1970) | 8.1°F (1985) | 0.48 in (1902) |
| December 3 | 78.1°F (2021) | 9.0°F (2006) | 4.87 in (1982) |
| December 4 | 77.0°F (2021) | 12.0°F (1991) | 1.90 in (1973) |
| December 5 | 71.1°F (1979) | 7.0°F (2006) | 1.20 in (1999) |
| December 6 | 75.9°F (1998) | 3.0°F (2002) | 1.65 in (1960) |
| December 7 | 77.0°F (1966) | 7.0°F (1976) | 1.03 in (1926) |
| December 8 | 75.0°F (1966) | 9.0°F (2017) | 1.20 in (1901) |
| December 9 | 77.0°F (1991) | 3.0°F (2005) | 1.09 in (1994) |
| December 10 | 73.0°F (2020) | -2.9°F (1995) | 2.65 in (1971) |
| December 11 | 73.9°F (2020) | -2.9°F (1995) | 1.60 in (1960) |
| December 12 | 73.0°F (2015) | 5.0°F (1989) | 1.05 in (1954) |
| December 13 | 71.1°F (2015) | 7.0°F (2010) | 1.95 in (1971) |
| December 14 | 68.0°F (2021) | -8.0°F (1985) | 1.43 in (1902) |
| December 15 | 69.1°F (1984) | 1.9°F (1989) | 1.62 in (1948) |
| December 16 | 75.0°F (2021) | -6.0°F (1989) | 1.25 in (1940) |
| December 17 | 71.1°F (2006) | 1.0°F (1963) | 1.67 in (1937) |
| December 18 | 69.1°F (2002) | 0.0°F (1964) | 1.56 in (1959) |
| December 19 | 75.0°F (1978) | 1.0°F (2016) | 1.82 in (1987) |
| December 20 | 70.0°F (1978) | 1.9°F (2000) | 0.60 in (1991) |
| December 21 | 64.0°F (1966) | 3.0°F (1989) | 2.53 in (1984) |
| December 22 | 70.0°F (1982) | -11.9°F (1989) | 0.64 in (1941) |
| December 23 | 72.0°F (1964) | -14.1°F (1989) | 1.30 in (1981) |
| December 24 | 75.9°F (2025) | -18.0°F (1989) | 1.93 in (1932) |
| December 25 | 75.9°F (2025) | -15.0°F (1989) | 2.34 in (1982) |
| December 26 | 77.0°F (2025) | -7.1°F (1983) | 1.22 in (1987) |
| December 27 | 78.1°F (2025) | 5.0°F (2002) | 3.82 in (1942) |
| December 28 | 80.1°F (2025) | 3.9°F (1988) | 2.48 in (1954) |
| December 29 | 75.9°F (2025) | -9.0°F (1983) | 0.80 in (1946) |
| December 30 | 72.0°F (1965) | -13.0°F (1983) | 3.06 in (1990) |
| December 31 | 71.1°F (1965) | -2.9°F (1976) | 1.44 in (1978) |