December weather in Superior, WY
The average temperature in Superior in December is 21.4°F (13.4°F–29.5°F). Average precipitation: 0.31 inches. Average snowfall is 5.8 inches.
December is a winter month in Superior, and is cooler than the annual average of 43.7°F. Daily temperatures swing about 16.1°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 8h 59m. For travel, December is cold.
Avg High
29.5°F
Avg Low
13.4°F
Precipitation
0.31 in
Snow
5.8 in
December records in Superior
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.0°F (1995) | -7.1°F (1991) | 0.51 in (1983) |
| December 2 | 57.9°F (2021) | 0.0°F (1971) | 0.38 in (1973) |
| December 3 | 53.1°F (1956) | -4.0°F (1967) | 0.24 in (1950) |
| December 4 | 54.0°F (2021) | -13.0°F (1972) | 0.77 in (1972) |
| December 5 | 51.1°F (1986) | -22.0°F (1972) | 0.21 in (1956) |
| December 6 | 54.0°F (1981) | -18.8°F (2013) | 0.17 in (1956) |
| December 7 | 51.1°F (1981) | -18.0°F (2005) | 0.15 in (1994) |
| December 8 | 51.1°F (1976) | -20.0°F (2005) | 0.70 in (1985) |
| December 9 | 53.1°F (1975) | -20.9°F (1972) | 0.50 in (1997) |
| December 10 | 53.1°F (1981) | -27.9°F (1972) | 0.34 in (1949) |
| December 11 | 53.1°F (2025) | -24.0°F (1972) | 0.14 in (1949) |
| December 12 | 51.1°F (2004) | -11.9°F (1972) | 0.94 in (1975) |
| December 13 | 51.1°F (2025) | -9.9°F (1967) | 0.21 in (1975) |
| December 14 | 52.0°F (1977) | -9.9°F (2008) | 0.11 in (1975) |
| December 15 | 51.1°F (2006) | -16.1°F (1972) | 0.27 in (1992) |
| December 16 | 57.9°F (2013) | -11.9°F (1964) | 0.27 in (1967) |
| December 17 | 57.0°F (1980) | -16.1°F (1964) | 0.20 in (1970) |
| December 18 | 51.1°F (1980) | -11.9°F (1964) | 0.40 in (1977) |
| December 19 | 54.0°F (2025) | -17.0°F (1990) | 0.35 in (2010) |
| December 20 | 51.1°F (1981) | -25.1°F (1990) | 0.25 in (1967) |
| December 21 | 57.9°F (2025) | -29.0°F (1990) | 0.19 in (1963) |
| December 22 | 59.0°F (2025) | -29.0°F (1990) | 0.37 in (1979) |
| December 23 | 55.9°F (2025) | -16.1°F (1990) | 0.27 in (1987) |
| December 24 | 51.1°F (2025) | -16.1°F (1983) | 0.22 in (1964) |
| December 25 | 55.0°F (2025) | -17.0°F (1987) | 0.44 in (1968) |
| December 26 | 52.0°F (1980) | -17.0°F (1952) | 0.28 in (2003) |
| December 27 | 51.1°F (1980) | -15.0°F (1948) | 0.22 in (1948) |
| December 28 | 48.9°F (2005) | -14.8°F (2015) | 0.13 in (1948) |
| December 29 | 46.9°F (2017) | -11.0°F (1978) | 0.43 in (1972) |
| December 30 | 52.0°F (1980) | -22.0°F (1978) | 0.46 in (1965) |
| December 31 | 53.1°F (1980) | -29.0°F (1978) | 0.38 in (1975) |