December weather in Fort Benton, MT
The average temperature in Fort Benton in December is 24.9°F (13.1°F–36.7°F). Average precipitation: 0.47 inches. Average snowfall is 7.9 inches.
December is a winter month in Fort Benton, and is cooler than the annual average of 45.4°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 8h 12m. For travel, December is cold.
Avg High
36.7°F
Avg Low
13.1°F
Precipitation
0.47 in
Snow
7.9 in
December records in Fort Benton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.0°F (1969) | -29.9°F (1897) | 0.40 in (1897) |
| December 2 | 71.1°F (2021) | -32.1°F (1985) | 0.60 in (1905) |
| December 3 | 66.0°F (1987) | -16.1°F (1970) | 0.49 in (2025) |
| December 4 | 66.0°F (1939) | -20.9°F (1972) | 0.40 in (1898) |
| December 5 | 73.0°F (1939) | -26.0°F (1950) | 0.21 in (1910) |
| December 6 | 66.9°F (1987) | -27.9°F (1972) | 0.25 in (1971) |
| December 7 | 66.0°F (2023) | -36.9°F (2013) | 0.45 in (1958) |
| December 8 | 66.0°F (1940) | -36.0°F (2013) | 0.40 in (1909) |
| December 9 | 66.9°F (1957) | -35.0°F (1977) | 0.30 in (1963) |
| December 10 | 68.0°F (1939) | -20.0°F (1977) | 0.44 in (1989) |
| December 11 | 62.1°F (1993) | -22.0°F (1961) | 0.45 in (2010) |
| December 12 | 64.0°F (1895) | -22.0°F (1961) | 0.43 in (1958) |
| December 13 | 64.0°F (1998) | -27.9°F (1963) | 0.40 in (1899) |
| December 14 | 64.0°F (2002) | -24.0°F (2009) | 0.30 in (1899) |
| December 15 | 66.9°F (1962) | -27.0°F (2008) | 0.28 in (1977) |
| December 16 | 66.0°F (2025) | -29.9°F (1979) | 0.30 in (1897) |
| December 17 | 64.0°F (1976) | -29.0°F (1964) | 0.17 in (1967) |
| December 18 | 60.1°F (1988) | -29.9°F (1983) | 0.40 in (1951) |
| December 19 | 63.0°F (1941) | -24.0°F (1983) | 0.27 in (2017) |
| December 20 | 66.0°F (1894) | -27.9°F (1949) | 0.32 in (1894) |
| December 21 | 63.0°F (1954) | -35.0°F (1990) | 0.68 in (1966) |
| December 22 | 62.1°F (1954) | -40.0°F (1990) | 0.38 in (1965) |
| December 23 | 63.0°F (1994) | -34.1°F (2022) | 0.36 in (1894) |
| December 24 | 59.0°F (1950) | -45.0°F (1983) | 0.41 in (1941) |
| December 25 | 57.9°F (1956) | -40.0°F (1983) | 0.45 in (2014) |
| December 26 | 64.0°F (1980) | -26.0°F (1996) | 0.40 in (1968) |
| December 27 | 66.9°F (1980) | -24.0°F (2021) | 0.39 in (1958) |
| December 28 | 64.9°F (1999) | -27.9°F (1968) | 0.32 in (2006) |
| December 29 | 66.9°F (1956) | -40.0°F (1968) | 0.31 in (1996) |
| December 30 | 60.1°F (1956) | -29.9°F (1968) | 0.48 in (2024) |
| December 31 | 63.0°F (1963) | -27.9°F (1992) | 0.36 in (1950) |