December weather in Fairfield, MT
The average temperature in Fairfield in December is 26.6°F (17.9°F–35.3°F). Average precipitation: 0.33 inches.
December is a winter month in Fairfield, and is cooler than the annual average of 44.4°F. Daily temperatures swing about 17.4°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 8h 14m. For travel, December is cold.
Avg High
35.3°F
Avg Low
17.9°F
Precipitation
0.33 in
Daylight
8h 14m
December records in Fairfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (2021) | -27.0°F (1985) | 0.12 in (2005) |
| December 2 | 68.0°F (2021) | -23.1°F (1985) | 0.63 in (1972) |
| December 3 | 60.1°F (1963) | -23.1°F (1972) | 0.13 in (1966) |
| December 4 | 61.0°F (1939) | -27.0°F (1972) | 0.28 in (1958) |
| December 5 | 63.0°F (1939) | -22.0°F (1980) | 0.25 in (1932) |
| December 6 | 60.1°F (2023) | -26.0°F (1956) | 0.25 in (1988) |
| December 7 | 60.1°F (2024) | -24.0°F (1972) | 0.41 in (1958) |
| December 8 | 61.0°F (2020) | -31.0°F (1972) | 0.18 in (1961) |
| December 9 | 61.0°F (1975) | -29.9°F (1977) | 0.17 in (1929) |
| December 10 | 60.1°F (1939) | -29.9°F (1977) | 0.25 in (1933) |
| December 11 | 55.9°F (1950) | -27.9°F (1932) | 0.32 in (1946) |
| December 12 | 57.0°F (2014) | -9.0°F (1971) | 0.32 in (1985) |
| December 13 | 59.0°F (2014) | -17.0°F (1963) | 0.31 in (1946) |
| December 14 | 63.0°F (2025) | -20.9°F (2009) | 0.22 in (2022) |
| December 15 | 62.1°F (1980) | -26.0°F (1964) | 0.24 in (1979) |
| December 16 | 64.9°F (1980) | -33.0°F (1964) | 0.43 in (1929) |
| December 17 | 62.1°F (1980) | -27.9°F (1964) | 0.17 in (1998) |
| December 18 | 55.9°F (1979) | -24.0°F (1990) | 0.14 in (2013) |
| December 19 | 61.0°F (2004) | -24.0°F (1990) | 0.22 in (2017) |
| December 20 | 59.0°F (2024) | -33.0°F (1990) | 0.18 in (1964) |
| December 21 | 57.0°F (1954) | -31.0°F (1990) | 0.30 in (1964) |
| December 22 | 55.0°F (1954) | -27.0°F (2022) | 0.19 in (1990) |
| December 23 | 57.0°F (1960) | -23.1°F (1983) | 0.45 in (1984) |
| December 24 | 59.0°F (1950) | -35.0°F (1983) | 0.30 in (1967) |
| December 25 | 57.9°F (2005) | -25.1°F (1983) | 0.12 in (1976) |
| December 26 | 61.0°F (1980) | -23.1°F (2021) | 0.11 in (1967) |
| December 27 | 57.9°F (2013) | -20.9°F (2021) | 0.19 in (1978) |
| December 28 | 64.0°F (1999) | -33.0°F (1990) | 0.26 in (2014) |
| December 29 | 66.0°F (1956) | -44.0°F (1968) | 0.35 in (2010) |
| December 30 | 57.9°F (1956) | -34.1°F (1968) | 0.34 in (2017) |
| December 31 | 53.1°F (1958) | -35.0°F (1927) | 0.25 in (2016) |