December weather in Afton, WY
The average temperature in Afton in December is 16.8°F (6.7°F–26.8°F). Average precipitation: 1.41 inches. Average snowfall is 17.5 inches.
December is a winter month in Afton, and is cooler than the annual average of 38.5°F. Daily temperatures swing about 20.1°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 8h 52m. For travel, December is cold.
Avg High
26.8°F
Avg Low
6.7°F
Precipitation
1.41 in
Snow
17.5 in
December records in Afton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.9°F (1995) | -18.0°F (1967) | 0.43 in (2003) |
| December 2 | 55.9°F (1995) | -18.9°F (1971) | 0.80 in (1977) |
| December 3 | 52.0°F (1987) | -9.9°F (2006) | 0.76 in (1977) |
| December 4 | 54.0°F (1998) | -23.1°F (1984) | 0.56 in (1972) |
| December 5 | 54.0°F (2021) | -26.0°F (1992) | 0.42 in (1980) |
| December 6 | 51.1°F (1981) | -22.0°F (1972) | 0.49 in (1995) |
| December 7 | 48.0°F (1987) | -18.9°F (1960) | 0.75 in (1957) |
| December 8 | 51.1°F (1976) | -15.0°F (1960) | 0.36 in (1985) |
| December 9 | 55.0°F (1976) | -25.1°F (1972) | 0.30 in (1963) |
| December 10 | 54.0°F (2015) | -36.0°F (1972) | 0.31 in (2025) |
| December 11 | 66.0°F (1995) | -38.0°F (1972) | 0.49 in (2012) |
| December 12 | 48.0°F (2014) | -23.1°F (1972) | 0.23 in (2019) |
| December 13 | 55.9°F (2014) | -18.9°F (1997) | 0.40 in (2022) |
| December 14 | 45.0°F (2002) | -20.9°F (1984) | 0.40 in (2006) |
| December 15 | 48.9°F (1962) | -25.1°F (1972) | 0.73 in (2021) |
| December 16 | 48.0°F (1962) | -15.0°F (1972) | 0.46 in (1967) |
| December 17 | 50.0°F (2025) | -27.9°F (1964) | 0.33 in (1957) |
| December 18 | 45.0°F (1976) | -27.9°F (1964) | 0.32 in (2020) |
| December 19 | 44.1°F (2025) | -18.9°F (1984) | 0.65 in (1958) |
| December 20 | 50.0°F (1957) | -14.1°F (1997) | 2.04 in (2007) |
| December 21 | 52.0°F (1969) | -18.9°F (1977) | 0.40 in (1961) |
| December 22 | 48.0°F (1969) | -29.0°F (1990) | 0.47 in (2022) |
| December 23 | 46.0°F (2025) | -27.9°F (1990) | 1.18 in (1964) |
| December 24 | 48.0°F (2025) | -20.0°F (1957) | 0.53 in (1977) |
| December 25 | 53.1°F (2025) | -36.9°F (1990) | 0.38 in (2021) |
| December 26 | 46.0°F (2025) | -18.0°F (1987) | 0.64 in (1977) |
| December 27 | 48.0°F (2022) | -22.0°F (2015) | 1.05 in (1996) |
| December 28 | 44.1°F (1980) | -20.9°F (1979) | 0.60 in (1972) |
| December 29 | 46.0°F (2008) | -26.0°F (1982) | 0.45 in (2024) |
| December 30 | 48.0°F (1996) | -29.0°F (1990) | 0.29 in (1981) |
| December 31 | 46.0°F (1996) | -25.1°F (2014) | 0.76 in (1995) |