January weather in Gillette, WY
The average temperature in Gillette in January is 26.0°F (15.8°F–36.2°F). Average precipitation: 0.59 inches. Average snowfall is 8.2 inches.
January is a winter month in Gillette, and is cooler than the annual average of 46.8°F. Daily temperatures swing about 20.4°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 2m. For travel, January is cold.
Avg High
36.2°F
Avg Low
15.8°F
Precipitation
0.59 in
Snow
8.2 in
January records in Gillette
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 54.0°F (2026) | -27.9°F (1928) | 0.30 in (1906) |
| January 2 | 57.9°F (1918) | -25.1°F (1968) | 0.31 in (2023) |
| January 3 | 55.9°F (2003) | -29.0°F (1959) | 0.20 in (1942) |
| January 4 | 57.9°F (2026) | -26.0°F (1959) | 0.54 in (1997) |
| January 5 | 53.1°F (1984) | -23.1°F (1979) | 0.20 in (1909) |
| January 6 | 50.0°F (1931) | -27.0°F (1968) | 0.40 in (1944) |
| January 7 | 61.0°F (2003) | -20.9°F (1982) | 0.25 in (1911) |
| January 8 | 60.1°F (1953) | -23.1°F (1973) | 0.27 in (1926) |
| January 9 | 62.1°F (1953) | -27.9°F (1973) | 0.42 in (1997) |
| January 10 | 54.0°F (1953) | -25.1°F (1997) | 0.30 in (1931) |
| January 11 | 55.0°F (1953) | -29.9°F (1963) | 0.20 in (1938) |
| January 12 | 61.0°F (2026) | -31.0°F (1997) | 0.32 in (1927) |
| January 13 | 57.9°F (1996) | -35.0°F (2024) | 0.20 in (1933) |
| January 14 | 54.0°F (1995) | -32.1°F (2024) | 0.70 in (1943) |
| January 15 | 54.0°F (2000) | -27.0°F (1930) | 0.20 in (1982) |
| January 16 | 57.0°F (1974) | -26.0°F (1930) | 0.30 in (1939) |
| January 17 | 55.0°F (1958) | -36.0°F (1930) | 0.67 in (1996) |
| January 18 | 55.9°F (1923) | -29.9°F (1943) | 0.28 in (1926) |
| January 19 | 55.9°F (2003) | -34.1°F (1963) | 0.25 in (1926) |
| January 20 | 59.0°F (2005) | -27.9°F (1935) | 0.66 in (1917) |
| January 21 | 59.0°F (2005) | -22.0°F (1930) | 0.40 in (1952) |
| January 22 | 64.0°F (1981) | -22.0°F (1917) | 0.34 in (2012) |
| January 23 | 66.9°F (1981) | -29.9°F (1963) | 0.60 in (1948) |
| January 24 | 63.0°F (2005) | -32.1°F (1949) | 0.40 in (2017) |
| January 25 | 54.0°F (2013) | -24.0°F (1957) | 0.60 in (1946) |
| January 26 | 63.0°F (2015) | -26.0°F (1972) | 0.40 in (1916) |
| January 27 | 62.1°F (2015) | -26.0°F (1916) | 0.46 in (2000) |
| January 28 | 57.9°F (1920) | -27.0°F (1929) | 0.42 in (1916) |
| January 29 | 62.1°F (1931) | -27.0°F (1916) | 0.64 in (1965) |
| January 30 | 63.0°F (2024) | -29.0°F (1918) | 0.16 in (1958) |
| January 31 | 62.1°F (2024) | -31.0°F (1917) | 0.34 in (1971) |