January weather in Custer, SD
The average temperature in Custer in January is 26.6°F (16.2°F–37.1°F). Average precipitation: 0.36 inches. Average snowfall is 6.6 inches.
January is a winter month in Custer, and is cooler than the annual average of 44.9°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 9h 5m. For travel, January is cold.
Avg High
37.1°F
Avg Low
16.2°F
Precipitation
0.36 in
Snow
6.6 in
January records in Custer
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 54.0°F (1963) | -23.1°F (1952) | 0.41 in (1976) |
| January 2 | 55.0°F (1964) | -20.9°F (1968) | 0.24 in (1968) |
| January 3 | 59.0°F (2003) | -29.9°F (1959) | 0.20 in (1943) |
| January 4 | 60.1°F (1962) | -31.0°F (1959) | 0.60 in (1922) |
| January 5 | 54.0°F (1981) | -22.0°F (1970) | 0.29 in (1923) |
| January 6 | 62.1°F (1954) | -18.0°F (2014) | 0.28 in (1982) |
| January 7 | 64.0°F (2003) | -26.0°F (1968) | 0.34 in (1975) |
| January 8 | 63.0°F (2003) | -24.0°F (1970) | 0.50 in (1993) |
| January 9 | 60.1°F (2002) | -23.1°F (1973) | 0.39 in (2011) |
| January 10 | 55.0°F (2004) | -24.0°F (1962) | 0.15 in (1924) |
| January 11 | 60.1°F (2012) | -31.0°F (1963) | 0.20 in (2024) |
| January 12 | 59.0°F (1959) | -29.0°F (1963) | 0.25 in (1972) |
| January 13 | 59.0°F (1996) | -25.1°F (2024) | 0.08 in (1930) |
| January 14 | 54.0°F (1986) | -29.0°F (2024) | 0.60 in (1916) |
| January 15 | 54.0°F (2000) | -20.0°F (1957) | 0.21 in (2003) |
| January 16 | 60.1°F (1973) | -18.0°F (1982) | 0.32 in (1996) |
| January 17 | 57.9°F (1974) | -25.1°F (1943) | 0.22 in (1930) |
| January 18 | 55.0°F (1976) | -29.9°F (1943) | 0.40 in (1933) |
| January 19 | 57.9°F (1997) | -43.1°F (1963) | 0.18 in (1929) |
| January 20 | 60.1°F (2009) | -31.0°F (1962) | 0.59 in (1917) |
| January 21 | 61.0°F (2009) | -27.0°F (1966) | 0.22 in (1974) |
| January 22 | 61.0°F (1981) | -25.1°F (1962) | 0.29 in (2020) |
| January 23 | 64.0°F (1981) | -26.0°F (1963) | 0.28 in (1964) |
| January 24 | 68.0°F (1981) | -18.0°F (1963) | 1.00 in (1921) |
| January 25 | 61.0°F (1968) | -29.9°F (1957) | 0.18 in (1997) |
| January 26 | 57.9°F (2015) | -25.1°F (1957) | 0.20 in (1916) |
| January 27 | 64.0°F (2015) | -26.0°F (1948) | 0.58 in (1944) |
| January 28 | 63.0°F (2015) | -27.9°F (1951) | 0.41 in (1925) |
| January 29 | 55.0°F (1989) | -36.0°F (1951) | 0.27 in (2003) |
| January 30 | 64.0°F (1960) | -26.0°F (1951) | 0.45 in (1971) |
| January 31 | 62.1°F (1992) | -18.9°F (1951) | 0.23 in (2011) |