December weather in St. Ignatius, MT
The average temperature in St. Ignatius in December is 29.5°F (22.5°F–36.5°F). Average precipitation: 0.94 inches.
December is a winter month in St. Ignatius, and is cooler than the annual average of 47.7°F. Daily temperatures swing about 14°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 17m. For travel, December is cold.
Avg High
36.5°F
Avg Low
22.5°F
Precipitation
0.94 in
Daylight
8h 17m
December records in St. Ignatius
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.0°F (2021) | -8.0°F (1919) | 0.46 in (1917) |
| December 2 | 64.0°F (2021) | -14.1°F (1985) | 0.42 in (1972) |
| December 3 | 62.1°F (1956) | -17.0°F (1919) | 0.39 in (1926) |
| December 4 | 61.0°F (1918) | -15.0°F (1919) | 0.46 in (1922) |
| December 5 | 60.1°F (1987) | -20.9°F (1972) | 0.33 in (1986) |
| December 6 | 59.0°F (1987) | -17.0°F (1972) | 0.87 in (1971) |
| December 7 | 60.1°F (1987) | -11.0°F (2005) | 0.40 in (1919) |
| December 8 | 61.0°F (1938) | -24.0°F (1972) | 0.18 in (1958) |
| December 9 | 63.0°F (1957) | -27.0°F (1932) | 0.28 in (1939) |
| December 10 | 66.0°F (1939) | -20.0°F (1972) | 0.40 in (1919) |
| December 11 | 62.1°F (1939) | -22.0°F (1932) | 0.40 in (1955) |
| December 12 | 62.1°F (1921) | -26.0°F (1919) | 0.82 in (1929) |
| December 13 | 60.1°F (1921) | -29.0°F (1919) | 0.56 in (1951) |
| December 14 | 57.9°F (1924) | -9.9°F (1932) | 0.23 in (1915) |
| December 15 | 60.1°F (1980) | -15.0°F (1919) | 0.73 in (1979) |
| December 16 | 59.0°F (1941) | -16.1°F (1924) | 0.56 in (1929) |
| December 17 | 54.0°F (1942) | -27.0°F (1964) | 0.42 in (1963) |
| December 18 | 55.9°F (1917) | -29.0°F (1924) | 0.50 in (1998) |
| December 19 | 66.9°F (1941) | -29.0°F (1924) | 0.61 in (1917) |
| December 20 | 57.0°F (1994) | -22.0°F (1924) | 0.46 in (1944) |
| December 21 | 57.0°F (1933) | -18.9°F (1990) | 0.50 in (1945) |
| December 22 | 54.0°F (1933) | -25.1°F (1983) | 0.47 in (1977) |
| December 23 | 55.0°F (1950) | -25.1°F (1983) | 1.18 in (1996) |
| December 24 | 55.9°F (1950) | -26.0°F (1983) | 1.17 in (1996) |
| December 25 | 57.9°F (1950) | -20.0°F (1924) | 0.50 in (1996) |
| December 26 | 57.9°F (1980) | -20.0°F (1916) | 0.45 in (1932) |
| December 27 | 60.1°F (1980) | -20.0°F (1916) | 0.60 in (1964) |
| December 28 | 55.9°F (1965) | -20.0°F (1990) | 0.50 in (1945) |
| December 29 | 57.9°F (1897) | -27.0°F (1990) | 0.60 in (1924) |
| December 30 | 55.9°F (1917) | -29.9°F (1968) | 0.92 in (2010) |
| December 31 | 57.0°F (1917) | -35.0°F (1927) | 0.22 in (1993) |