December weather in Plains, MT
The average temperature in Plains in December is 27.1°F (20.9°F–33.3°F). Average precipitation: inches.
December is a winter month in Plains, and is cooler than the annual average of 46.2°F. Daily temperatures swing about 12.4°F between overnight low and afternoon high. Daylight averages about 8h 16m. For travel, December is cold.
Avg High
33.3°F
Avg Low
20.9°F
Precipitation
in
Daylight
8h 16m
December records in Plains
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 48.9°F (1972) | -15.0°F (1985) | 0.51 in (1995) |
| December 2 | 46.9°F (2008) | -9.9°F (1985) | 1.09 in (1977) |
| December 3 | 46.9°F (1965) | 1.0°F (1992) | 1.08 in (2007) |
| December 4 | 48.0°F (1987) | -6.0°F (1972) | 1.07 in (1980) |
| December 5 | 43.0°F (1962) | -15.0°F (1972) | 0.83 in (1966) |
| December 6 | 52.0°F (2008) | -11.9°F (1972) | 0.70 in (1981) |
| December 7 | 53.1°F (1962) | -14.1°F (1972) | 0.40 in (1981) |
| December 8 | 52.0°F (1962) | -18.0°F (1972) | 0.45 in (1996) |
| December 9 | 50.0°F (1979) | -15.0°F (1961) | 0.56 in (1996) |
| December 10 | 52.0°F (1979) | -20.9°F (1961) | 0.52 in (1981) |
| December 11 | 48.0°F (1974) | -24.0°F (1961) | 0.56 in (2004) |
| December 12 | 46.0°F (1974) | -9.9°F (1961) | 0.55 in (1995) |
| December 13 | 48.0°F (1995) | -2.0°F (1970) | 0.35 in (1996) |
| December 14 | 45.0°F (2006) | 0.0°F (2008) | 0.72 in (2010) |
| December 15 | 48.9°F (1980) | -8.0°F (1964) | 0.72 in (2000) |
| December 16 | 48.9°F (1980) | -16.1°F (1964) | 0.33 in (1997) |
| December 17 | 45.0°F (1998) | -33.0°F (1964) | 0.30 in (1997) |
| December 18 | 48.0°F (1966) | -18.0°F (1964) | 0.72 in (1961) |
| December 19 | 50.0°F (2004) | -14.1°F (1964) | 0.33 in (1961) |
| December 20 | 48.9°F (1965) | -8.0°F (1964) | 0.27 in (1996) |
| December 21 | 43.0°F (1962) | -16.1°F (1983) | 0.49 in (1961) |
| December 22 | 44.1°F (1972) | -20.9°F (1983) | 0.60 in (1972) |
| December 23 | 42.1°F (1972) | -20.0°F (1983) | 0.31 in (1996) |
| December 24 | 44.1°F (1992) | -20.9°F (1983) | 0.66 in (1961) |
| December 25 | 42.1°F (1975) | -5.1°F (1983) | 0.45 in (1967) |
| December 26 | 46.9°F (1972) | -11.9°F (1996) | 0.51 in (1998) |
| December 27 | 46.9°F (1967) | -2.0°F (1977) | 0.47 in (1996) |
| December 28 | 46.9°F (1967) | -8.0°F (1983) | 0.98 in (1964) |
| December 29 | 48.9°F (1997) | -24.0°F (1978) | 1.28 in (1996) |
| December 30 | 46.0°F (1997) | -34.1°F (1968) | 0.31 in (1996) |
| December 31 | 50.0°F (1963) | -29.0°F (1968) | 0.52 in (1996) |