January weather in Interior, SD
The average temperature in Interior in January is 25.7°F (14.2°F–37.1°F). Average precipitation: 0.46 inches. Average snowfall is 5.5 inches.
January is a winter month in Interior, and is cooler than the annual average of 50.4°F. Daily temperatures swing about 22.9°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
14.2°F
Precipitation
0.46 in
Snow
5.5 in
January records in Interior
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 64.9°F (1998) | -20.9°F (1979) | 0.18 in (1976) |
| January 2 | 69.1°F (1998) | -17.0°F (1978) | 0.37 in (2006) |
| January 3 | 64.0°F (1998) | -24.0°F (1968) | 0.46 in (1997) |
| January 4 | 64.9°F (2026) | -20.0°F (1959) | 0.47 in (1997) |
| January 5 | 71.1°F (2012) | -23.1°F (1988) | 0.35 in (2025) |
| January 6 | 64.9°F (2012) | -24.0°F (1988) | 0.42 in (2010) |
| January 7 | 62.1°F (2003) | -24.0°F (1968) | 0.40 in (1992) |
| January 8 | 64.9°F (1958) | -22.0°F (2010) | 0.42 in (1992) |
| January 9 | 61.0°F (2001) | -26.0°F (1988) | 0.24 in (2011) |
| January 10 | 64.0°F (1990) | -22.0°F (1982) | 0.09 in (1963) |
| January 11 | 64.9°F (1987) | -22.0°F (1982) | 0.41 in (2013) |
| January 12 | 69.1°F (1987) | -20.9°F (1974) | 0.38 in (1979) |
| January 13 | 64.9°F (1987) | -22.0°F (1979) | 0.15 in (2026) |
| January 14 | 66.0°F (2006) | -20.0°F (1979) | 0.25 in (1977) |
| January 15 | 64.0°F (2006) | -15.0°F (1979) | 0.39 in (1985) |
| January 16 | 64.0°F (1974) | -20.0°F (2005) | 0.05 in (1956) |
| January 17 | 64.0°F (1974) | -9.0°F (1962) | 0.35 in (1996) |
| January 18 | 57.9°F (2006) | -14.1°F (1977) | 0.17 in (2008) |
| January 19 | 59.0°F (1974) | -27.9°F (1963) | 0.14 in (1988) |
| January 20 | 61.0°F (1964) | -18.9°F (1962) | 0.13 in (1975) |
| January 21 | 63.0°F (1964) | -24.0°F (1966) | 0.41 in (2018) |
| January 22 | 60.1°F (1967) | -16.1°F (1966) | 0.41 in (1982) |
| January 23 | 64.9°F (1981) | -15.0°F (2003) | 0.33 in (1982) |
| January 24 | 64.0°F (2005) | -15.0°F (1963) | 0.54 in (2017) |
| January 25 | 64.9°F (2006) | -24.0°F (1957) | 0.23 in (2017) |
| January 26 | 64.9°F (2002) | -26.0°F (1957) | 0.20 in (2009) |
| January 27 | 71.1°F (2015) | -22.0°F (1963) | 0.08 in (2009) |
| January 28 | 68.0°F (2015) | -18.0°F (1972) | 0.16 in (2023) |
| January 29 | 60.1°F (1988) | -17.0°F (2002) | 0.25 in (2000) |
| January 30 | 64.0°F (1989) | -14.1°F (1985) | 0.27 in (1971) |
| January 31 | 66.9°F (1992) | -20.9°F (1985) | 0.80 in (1971) |