December weather in Terry, MT
The average temperature in Terry in December is 21.0°F (9.7°F–32.2°F). Average precipitation: 0.32 inches. Average snowfall is 3.1 inches.
December is a winter month in Terry, and is cooler than the annual average of 45.3°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 8h 21m. For travel, December is cold.
Avg High
32.2°F
Avg Low
9.7°F
Precipitation
0.32 in
Snow
3.1 in
December records in Terry
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (1995) | -15.0°F (1966) | 0.30 in (2006) |
| December 2 | 72.0°F (2021) | -38.0°F (1985) | 0.12 in (1975) |
| December 3 | 59.0°F (1989) | -35.0°F (1985) | 0.28 in (2013) |
| December 4 | 59.0°F (1989) | -13.0°F (1984) | 0.31 in (2013) |
| December 5 | 69.1°F (1979) | -22.0°F (1972) | 0.13 in (1994) |
| December 6 | 61.0°F (1979) | -29.9°F (1950) | 0.18 in (2022) |
| December 7 | 61.0°F (2023) | -35.0°F (2013) | 0.29 in (2022) |
| December 8 | 57.0°F (2024) | -34.1°F (2013) | 0.12 in (1983) |
| December 9 | 63.0°F (2020) | -40.0°F (1977) | 0.41 in (2024) |
| December 10 | 63.0°F (1957) | -38.0°F (1977) | 0.09 in (2000) |
| December 11 | 59.0°F (1987) | -23.1°F (1989) | 0.38 in (2025) |
| December 12 | 61.0°F (1980) | -26.0°F (2000) | 0.28 in (1968) |
| December 13 | 57.9°F (2004) | -31.0°F (1985) | 0.16 in (2025) |
| December 14 | 55.0°F (1988) | -29.0°F (1963) | 0.31 in (2009) |
| December 15 | 57.0°F (1979) | -34.1°F (2009) | 0.51 in (2022) |
| December 16 | 64.0°F (1980) | -27.9°F (2008) | 0.07 in (2016) |
| December 17 | 59.0°F (1962) | -35.0°F (1975) | 0.08 in (2021) |
| December 18 | 59.0°F (1998) | -34.1°F (1983) | 0.12 in (2025) |
| December 19 | 62.1°F (1979) | -27.0°F (1984) | 0.27 in (2013) |
| December 20 | 57.0°F (2004) | -32.1°F (1951) | 0.20 in (1951) |
| December 21 | 57.0°F (1954) | -42.0°F (1989) | 0.12 in (1995) |
| December 22 | 55.0°F (1954) | -47.0°F (1989) | 0.27 in (1996) |
| December 23 | 60.1°F (1954) | -43.1°F (1983) | 0.35 in (2009) |
| December 24 | 52.0°F (1950) | -36.0°F (1983) | 0.32 in (1977) |
| December 25 | 54.0°F (2020) | -32.1°F (1983) | 0.15 in (1973) |
| December 26 | 54.0°F (1963) | -32.1°F (1983) | 0.30 in (1998) |
| December 27 | 57.0°F (1976) | -26.0°F (1983) | 0.44 in (2003) |
| December 28 | 55.0°F (1956) | -22.0°F (1968) | 0.06 in (1998) |
| December 29 | 60.1°F (1999) | -27.9°F (1988) | 0.50 in (1973) |
| December 30 | 57.0°F (1956) | -32.1°F (1990) | 0.42 in (1998) |
| December 31 | 52.0°F (1999) | -34.1°F (1978) | 0.25 in (2011) |