January weather in Grass Range, MT
The average temperature in Grass Range in January is 25.7°F (14.2°F–37.2°F). Average precipitation: 0.68 inches. Average snowfall is 8.7 inches.
January is a winter month in Grass Range, and is cooler than the annual average of 45.5°F. Daily temperatures swing about 23°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 8h 42m. For travel, January is cold.
Avg High
37.2°F
Avg Low
14.2°F
Precipitation
0.68 in
Snow
8.7 in
January records in Grass Range
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 63.0°F (1964) | -29.0°F (1942) | 0.92 in (1991) |
| January 2 | 59.0°F (1962) | -27.9°F (1968) | 0.41 in (1955) |
| January 3 | 61.0°F (1981) | -34.1°F (1950) | 0.25 in (1996) |
| January 4 | 64.0°F (1984) | -24.0°F (1950) | 0.72 in (2025) |
| January 5 | 60.1°F (1984) | -23.1°F (1982) | 0.35 in (2010) |
| January 6 | 63.0°F (1954) | -26.0°F (1968) | 0.56 in (2015) |
| January 7 | 72.0°F (2003) | -31.0°F (1937) | 0.35 in (1969) |
| January 8 | 66.9°F (1958) | -27.9°F (1937) | 0.50 in (1978) |
| January 9 | 60.1°F (1959) | -26.0°F (1957) | 0.44 in (1971) |
| January 10 | 66.0°F (1986) | -23.1°F (1993) | 0.45 in (1971) |
| January 11 | 64.9°F (1987) | -38.0°F (1997) | 0.38 in (1982) |
| January 12 | 68.0°F (1987) | -34.1°F (1963) | 0.51 in (1993) |
| January 13 | 66.0°F (1986) | -32.1°F (1997) | 0.20 in (1984) |
| January 14 | 66.0°F (2026) | -35.0°F (2024) | 0.31 in (2009) |
| January 15 | 64.9°F (1974) | -34.1°F (1950) | 0.28 in (2003) |
| January 16 | 64.9°F (1974) | -22.0°F (1954) | 0.16 in (1994) |
| January 17 | 64.9°F (1976) | -27.0°F (1950) | 0.23 in (2024) |
| January 18 | 57.9°F (1986) | -34.1°F (1943) | 0.55 in (1975) |
| January 19 | 64.0°F (1986) | -29.9°F (1935) | 0.35 in (2012) |
| January 20 | 66.9°F (1981) | -38.0°F (1954) | 0.27 in (1957) |
| January 21 | 70.0°F (1981) | -35.0°F (1954) | 0.36 in (2019) |
| January 22 | 73.9°F (1981) | -29.0°F (1943) | 0.64 in (1993) |
| January 23 | 69.1°F (1981) | -33.0°F (1969) | 0.76 in (1989) |
| January 24 | 66.9°F (1968) | -40.0°F (1969) | 0.90 in (1991) |
| January 25 | 66.9°F (2007) | -38.9°F (1957) | 0.40 in (1978) |
| January 26 | 69.1°F (2015) | -35.0°F (1957) | 0.46 in (1978) |
| January 27 | 64.0°F (2015) | -33.0°F (1915) | 0.30 in (1977) |
| January 28 | 70.0°F (1941) | -36.0°F (1969) | 0.62 in (1991) |
| January 29 | 64.9°F (1940) | -31.0°F (1969) | 0.52 in (1965) |
| January 30 | 69.1°F (1941) | -36.9°F (1996) | 0.65 in (1971) |
| January 31 | 69.1°F (1992) | -34.1°F (1969) | 0.45 in (1971) |