January weather in Westby, MT
The average temperature in Westby in January is 8.7°F (-2.2°F–19.5°F). Average precipitation: 0.37 inches.
January is a winter month in Westby, and is cooler than the annual average of 39.1°F. Daily temperatures swing about 21.7°F between overnight low and afternoon high. Daylight averages about 8h 28m. For travel, January is cold.
Avg High
19.5°F
Avg Low
-2.2°F
Precipitation
0.37 in
Daylight
8h 28m
January records in Westby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 45.0°F (1964) | -32.1°F (1982) | 0.55 in (1960) |
| January 2 | 46.9°F (1997) | -33.0°F (2018) | 0.12 in (1982) |
| January 3 | 44.1°F (2012) | -33.0°F (1950) | 0.40 in (1951) |
| January 4 | 46.0°F (2019) | -40.0°F (1950) | 0.13 in (1978) |
| January 5 | 54.0°F (2012) | -40.0°F (2005) | 0.53 in (1989) |
| January 6 | 55.0°F (2012) | -36.9°F (2005) | 0.70 in (2010) |
| January 7 | 46.0°F (1963) | -41.1°F (1937) | 0.28 in (1977) |
| January 8 | 46.9°F (2002) | -41.1°F (1937) | 1.00 in (2011) |
| January 9 | 55.0°F (2002) | -33.0°F (1991) | 0.50 in (2009) |
| January 10 | 51.1°F (2012) | -36.9°F (1982) | 0.28 in (1980) |
| January 11 | 45.0°F (1992) | -35.0°F (1974) | 0.39 in (1984) |
| January 12 | 45.0°F (1996) | -33.0°F (1974) | 1.00 in (2011) |
| January 13 | 46.9°F (1944) | -38.9°F (1965) | 2.00 in (2011) |
| January 14 | 52.0°F (2021) | -35.0°F (2005) | 0.42 in (1945) |
| January 15 | 48.9°F (2006) | -42.0°F (2009) | 0.93 in (1947) |
| January 16 | 46.0°F (1961) | -36.9°F (2009) | 0.35 in (1943) |
| January 17 | 50.0°F (1944) | -40.0°F (1943) | 0.32 in (1995) |
| January 18 | 46.9°F (1944) | -40.0°F (1943) | 0.30 in (2013) |
| January 19 | 45.0°F (1944) | -33.0°F (1943) | 0.17 in (1967) |
| January 20 | 45.0°F (1942) | -45.0°F (1954) | 0.20 in (1950) |
| January 21 | 45.0°F (1944) | -38.9°F (1937) | 0.30 in (1999) |
| January 22 | 46.0°F (1981) | -36.0°F (1937) | 0.75 in (1943) |
| January 23 | 52.0°F (1981) | -44.0°F (1943) | 0.17 in (1964) |
| January 24 | 50.0°F (1973) | -36.9°F (1943) | 0.70 in (2013) |
| January 25 | 45.0°F (1968) | -45.0°F (1943) | 0.50 in (2004) |
| January 26 | 46.9°F (1942) | -42.0°F (1950) | 0.70 in (1951) |
| January 27 | 51.1°F (2015) | -32.1°F (1997) | 0.20 in (1962) |
| January 28 | 53.1°F (2015) | -34.1°F (1969) | 0.12 in (1970) |
| January 29 | 46.0°F (1992) | -38.9°F (1951) | 0.24 in (1984) |
| January 30 | 52.0°F (2024) | -36.0°F (1950) | 2.00 in (2011) |
| January 31 | 57.0°F (2024) | -36.9°F (1996) | 0.35 in (1965) |