December weather in Troy, MT
The average temperature in Troy in December is 27.9°F (23.5°F–32.4°F). Average precipitation: 2.79 inches.
December is a winter month in Troy, and is cooler than the annual average of 46.8°F. Daily temperatures swing about 8.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 8h 7m. For travel, December is cold.
Avg High
32.4°F
Avg Low
23.5°F
Precipitation
2.79 in
Daylight
8h 7m
December records in Troy
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (2021) | -15.0°F (1985) | 1.13 in (1998) |
| December 2 | 54.0°F (2021) | -11.0°F (1985) | 1.97 in (1980) |
| December 3 | 53.1°F (2021) | 1.0°F (1984) | 0.57 in (2001) |
| December 4 | 48.0°F (2003) | -2.9°F (1972) | 1.87 in (1975) |
| December 5 | 48.0°F (2012) | -0.9°F (1972) | 0.81 in (1980) |
| December 6 | 45.0°F (2003) | -0.9°F (1972) | 1.03 in (1981) |
| December 7 | 48.0°F (2003) | -5.1°F (2005) | 1.76 in (1970) |
| December 8 | 51.1°F (2015) | -14.1°F (1972) | 0.67 in (2012) |
| December 9 | 53.1°F (1979) | -9.0°F (1972) | 1.46 in (2015) |
| December 10 | 55.0°F (1975) | -9.0°F (1961) | 0.84 in (1987) |
| December 11 | 55.0°F (2004) | -11.9°F (1961) | 0.97 in (2004) |
| December 12 | 55.0°F (2004) | -5.1°F (1961) | 0.71 in (1969) |
| December 13 | 53.1°F (2004) | -2.0°F (1972) | 0.51 in (1995) |
| December 14 | 45.0°F (1998) | -2.0°F (2008) | 1.12 in (2002) |
| December 15 | 46.0°F (1988) | -4.0°F (2008) | 0.78 in (2006) |
| December 16 | 45.0°F (2006) | -15.0°F (2008) | 0.80 in (1982) |
| December 17 | 48.9°F (1998) | -26.0°F (1964) | 1.17 in (1961) |
| December 18 | 52.0°F (1998) | -5.1°F (2005) | 0.78 in (1999) |
| December 19 | 51.1°F (2020) | -4.0°F (1983) | 0.59 in (2017) |
| December 20 | 50.0°F (2020) | -9.9°F (2008) | 1.08 in (2021) |
| December 21 | 50.0°F (2020) | -16.1°F (1983) | 0.93 in (2020) |
| December 22 | 48.0°F (1972) | -14.1°F (1983) | 2.09 in (1964) |
| December 23 | 46.0°F (1972) | -16.1°F (1983) | 0.70 in (2005) |
| December 24 | 46.9°F (1992) | -13.0°F (1983) | 0.45 in (1965) |
| December 25 | 46.0°F (1992) | -0.9°F (1983) | 0.63 in (1980) |
| December 26 | 52.0°F (1972) | 1.9°F (1988) | 0.85 in (1972) |
| December 27 | 50.0°F (1980) | -6.0°F (1971) | 1.23 in (1996) |
| December 28 | 50.0°F (1980) | -6.0°F (1983) | 1.39 in (1998) |
| December 29 | 52.0°F (1997) | -29.9°F (1968) | 0.77 in (2011) |
| December 30 | 48.0°F (1997) | -35.0°F (1968) | 0.75 in (1984) |
| December 31 | 51.1°F (1963) | -20.9°F (1968) | 0.84 in (2017) |