January weather in Lewistown, MT
The average temperature in Lewistown in January is 23.7°F (12.9°F–34.4°F). Average precipitation: 0.58 inches.
January is a winter month in Lewistown, and is cooler than the annual average of 43.1°F. Daily temperatures swing about 21.5°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 8h 42m. For travel, January is cold.
Avg High
34.4°F
Avg Low
12.9°F
Precipitation
0.58 in
Daylight
8h 42m
January records in Lewistown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.0°F (1939) | -33.0°F (1942) | 0.35 in (1999) |
| January 2 | 60.1°F (2012) | -29.0°F (1950) | 0.70 in (1910) |
| January 3 | 55.9°F (1981) | -31.0°F (1950) | 0.27 in (1977) |
| January 4 | 59.0°F (2012) | -26.0°F (2004) | 0.33 in (1968) |
| January 5 | 57.0°F (2012) | -27.9°F (1909) | 0.32 in (1953) |
| January 6 | 55.0°F (2006) | -26.0°F (1913) | 0.38 in (1999) |
| January 7 | 68.0°F (2003) | -29.9°F (1937) | 0.27 in (1971) |
| January 8 | 61.0°F (1958) | -33.0°F (1909) | 0.44 in (1978) |
| January 9 | 60.1°F (1919) | -27.9°F (1909) | 0.50 in (1909) |
| January 10 | 57.0°F (1941) | -36.9°F (1909) | 0.25 in (1939) |
| January 11 | 61.0°F (1953) | -36.0°F (1916) | 0.51 in (2025) |
| January 12 | 62.1°F (1987) | -45.0°F (1911) | 0.30 in (1907) |
| January 13 | 60.1°F (1944) | -42.9°F (2024) | 0.48 in (1984) |
| January 14 | 64.0°F (2026) | -34.1°F (1972) | 0.40 in (1956) |
| January 15 | 60.1°F (1973) | -31.9°F (2024) | 0.62 in (1911) |
| January 16 | 64.0°F (1974) | -31.0°F (1916) | 0.30 in (1897) |
| January 17 | 55.9°F (1976) | -31.0°F (1950) | 0.35 in (1920) |
| January 18 | 57.0°F (1921) | -31.0°F (1963) | 0.84 in (1975) |
| January 19 | 60.1°F (1986) | -31.0°F (1954) | 0.40 in (1906) |
| January 20 | 57.9°F (1981) | -32.1°F (1949) | 0.36 in (2003) |
| January 21 | 61.0°F (1981) | -34.1°F (1927) | 0.50 in (1979) |
| January 22 | 73.0°F (1981) | -27.0°F (1952) | 0.42 in (1989) |
| January 23 | 64.0°F (2005) | -38.0°F (1929) | 0.41 in (1954) |
| January 24 | 64.9°F (2005) | -34.1°F (1957) | 0.26 in (1959) |
| January 25 | 64.9°F (2006) | -34.1°F (1957) | 0.87 in (1978) |
| January 26 | 60.1°F (1906) | -27.9°F (1902) | 0.38 in (2002) |
| January 27 | 61.0°F (2015) | -41.1°F (1916) | 0.47 in (2023) |
| January 28 | 66.0°F (1941) | -45.9°F (1929) | 0.35 in (1907) |
| January 29 | 64.0°F (1931) | -40.0°F (1929) | 0.41 in (1965) |
| January 30 | 64.9°F (1941) | -33.0°F (1996) | 0.56 in (1971) |
| January 31 | 64.9°F (2024) | -40.0°F (1917) | 0.29 in (1965) |