January weather in Roundup, MT
The average temperature in Roundup in January is 25.1°F (13.1°F–37.2°F). Average precipitation: 0.37 inches. Average snowfall is 5.2 inches.
January is a winter month in Roundup, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 8h 47m. For travel, January is cold.
Avg High
37.2°F
Avg Low
13.1°F
Precipitation
0.37 in
Snow
5.2 in
January records in Roundup
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 60.1°F (1918) | -32.1°F (1942) | 0.20 in (2014) |
| January 2 | 63.0°F (1918) | -31.0°F (1968) | 0.45 in (1943) |
| January 3 | 57.9°F (1918) | -25.1°F (1950) | 0.31 in (2000) |
| January 4 | 61.0°F (2012) | -23.1°F (1959) | 0.32 in (1977) |
| January 5 | 63.0°F (2001) | -34.1°F (2004) | 0.26 in (2010) |
| January 6 | 60.1°F (1948) | -26.0°F (2004) | 0.42 in (1989) |
| January 7 | 64.0°F (2003) | -32.1°F (2010) | 0.22 in (1969) |
| January 8 | 61.0°F (1958) | -27.9°F (1973) | 0.40 in (1978) |
| January 9 | 69.1°F (1953) | -31.0°F (1973) | 0.39 in (1971) |
| January 10 | 62.1°F (1986) | -29.0°F (1949) | 0.34 in (2018) |
| January 11 | 70.0°F (1953) | -29.9°F (1980) | 0.32 in (1988) |
| January 12 | 63.0°F (1953) | -36.9°F (1916) | 0.40 in (1993) |
| January 13 | 63.0°F (1986) | -25.1°F (1997) | 0.32 in (1979) |
| January 14 | 63.0°F (1944) | -29.9°F (1979) | 0.25 in (1956) |
| January 15 | 61.0°F (1944) | -31.0°F (1950) | 0.33 in (2003) |
| January 16 | 66.0°F (1974) | -31.0°F (1930) | 0.40 in (1999) |
| January 17 | 66.0°F (1974) | -36.0°F (1930) | 0.40 in (1920) |
| January 18 | 61.0°F (1919) | -27.9°F (1943) | 0.52 in (1975) |
| January 19 | 62.1°F (2009) | -33.0°F (1963) | 0.43 in (2012) |
| January 20 | 66.9°F (1981) | -38.9°F (1954) | 0.34 in (1969) |
| January 21 | 70.0°F (1923) | -31.0°F (1962) | 0.28 in (1922) |
| January 22 | 70.0°F (1923) | -27.0°F (1982) | 0.35 in (1989) |
| January 23 | 66.0°F (1981) | -33.0°F (1963) | 0.45 in (1989) |
| January 24 | 66.9°F (1968) | -41.1°F (1969) | 0.40 in (1989) |
| January 25 | 64.0°F (1968) | -41.1°F (1957) | 0.75 in (1918) |
| January 26 | 68.0°F (2015) | -36.9°F (1957) | 0.64 in (1920) |
| January 27 | 63.0°F (2015) | -34.1°F (1916) | 0.18 in (1995) |
| January 28 | 64.0°F (1931) | -35.0°F (1916) | 0.40 in (1943) |
| January 29 | 66.0°F (1931) | -31.0°F (1963) | 0.27 in (1996) |
| January 30 | 64.9°F (1931) | -40.0°F (1996) | 0.29 in (1971) |
| January 31 | 64.9°F (1962) | -38.9°F (1917) | 0.23 in (1922) |