December weather in Deer Lodge, MT
The average temperature in Deer Lodge in December is 20.9°F (10.5°F–31.3°F). Average precipitation: 0.50 inches.
December is a winter month in Deer Lodge, and is cooler than the annual average of 40.3°F. Daily temperatures swing about 20.8°F between overnight low and afternoon high. Daylight averages about 8h 25m. For travel, December is cold.
Avg High
31.3°F
Avg Low
10.5°F
Precipitation
0.50 in
Daylight
8h 25m
December records in Deer Lodge
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.0°F (2021) | -17.0°F (2009) | 0.20 in (2025) |
| December 2 | 66.0°F (2021) | -18.9°F (1985) | 0.30 in (1977) |
| December 3 | 59.0°F (2021) | -17.0°F (2009) | 1.03 in (2025) |
| December 4 | 55.0°F (1979) | -20.9°F (1972) | 0.11 in (1977) |
| December 5 | 59.0°F (1965) | -34.1°F (1972) | 0.33 in (1978) |
| December 6 | 59.0°F (2023) | -29.0°F (1972) | 0.17 in (2005) |
| December 7 | 59.0°F (2023) | -29.0°F (2009) | 0.90 in (2021) |
| December 8 | 54.0°F (1979) | -35.0°F (1972) | 0.11 in (2025) |
| December 9 | 60.1°F (2020) | -36.0°F (1972) | 0.14 in (2010) |
| December 10 | 59.0°F (2025) | -29.0°F (1972) | 0.13 in (2025) |
| December 11 | 59.0°F (2004) | -25.1°F (1961) | 0.11 in (2003) |
| December 12 | 54.0°F (2025) | -23.1°F (2000) | 0.10 in (1985) |
| December 13 | 54.0°F (2025) | -23.1°F (2000) | 0.07 in (2021) |
| December 14 | 59.0°F (2025) | -17.0°F (1967) | 0.14 in (2015) |
| December 15 | 57.0°F (1980) | -20.9°F (2008) | 0.23 in (1975) |
| December 16 | 60.1°F (1980) | -33.0°F (1964) | 0.40 in (1996) |
| December 17 | 54.0°F (1980) | -38.9°F (1964) | 0.06 in (1983) |
| December 18 | 51.1°F (1979) | -24.0°F (1964) | 0.08 in (1969) |
| December 19 | 57.9°F (2004) | -24.0°F (1990) | 0.11 in (1962) |
| December 20 | 52.0°F (2023) | -27.0°F (1990) | 0.16 in (2021) |
| December 21 | 50.0°F (1969) | -36.0°F (1983) | 0.15 in (1999) |
| December 22 | 55.0°F (2020) | -40.0°F (2022) | 0.25 in (1972) |
| December 23 | 48.9°F (1964) | -40.0°F (2022) | 0.16 in (2020) |
| December 24 | 52.0°F (2025) | -40.0°F (1983) | 0.16 in (2018) |
| December 25 | 51.1°F (2025) | -25.1°F (1983) | 0.17 in (1965) |
| December 26 | 59.0°F (1980) | -20.9°F (1996) | 0.85 in (1996) |
| December 27 | 57.0°F (1980) | -18.9°F (1996) | 0.30 in (1973) |
| December 28 | 48.9°F (1980) | -26.0°F (1983) | 0.30 in (2005) |
| December 29 | 48.9°F (1962) | -40.0°F (1978) | 0.14 in (2006) |
| December 30 | 53.1°F (1997) | -38.9°F (1978) | 0.38 in (2004) |
| December 31 | 53.1°F (1997) | -35.0°F (1990) | 0.21 in (2001) |