January weather in Ketchum, ID
The average temperature in Ketchum in January is 19.6°F (8.0°F–31.3°F). Average precipitation: 2.25 inches. Average snowfall is 27.0 inches.
January is a winter month in Ketchum, and is cooler than the annual average of 40.2°F. Daily temperatures swing about 23.3°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 5m. For travel, January is cold.
Avg High
31.3°F
Avg Low
8.0°F
Precipitation
2.25 in
Snow
27.0 in
January records in Ketchum
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 44.1°F (2026) | -25.1°F (1979) | 1.24 in (1997) |
| January 2 | 42.1°F (1998) | -25.1°F (1979) | 1.64 in (1997) |
| January 3 | 41.0°F (2024) | -18.9°F (1974) | 0.67 in (1977) |
| January 4 | 46.0°F (2014) | -18.0°F (1974) | 0.58 in (1982) |
| January 5 | 44.1°F (2018) | -14.1°F (2009) | 1.50 in (2008) |
| January 6 | 50.0°F (1999) | -18.0°F (1982) | 1.00 in (1978) |
| January 7 | 46.0°F (2001) | -20.9°F (1982) | 0.50 in (2019) |
| January 8 | 46.9°F (2015) | -18.9°F (1974) | 1.08 in (2005) |
| January 9 | 44.1°F (2015) | -18.9°F (1974) | 0.96 in (1995) |
| January 10 | 45.0°F (1990) | -18.9°F (1974) | 0.68 in (1995) |
| January 11 | 46.9°F (1990) | -18.0°F (1974) | 1.19 in (1995) |
| January 12 | 44.1°F (1990) | -16.1°F (1974) | 0.87 in (1980) |
| January 13 | 44.1°F (2009) | -16.1°F (2025) | 1.08 in (1980) |
| January 14 | 48.9°F (2026) | -16.1°F (2007) | 0.47 in (1995) |
| January 15 | 52.0°F (2026) | -15.0°F (2013) | 0.75 in (1974) |
| January 16 | 46.0°F (2026) | -15.0°F (2013) | 0.71 in (1974) |
| January 17 | 50.0°F (1977) | -16.1°F (1984) | 0.91 in (1986) |
| January 18 | 50.0°F (1977) | -25.1°F (1984) | 0.56 in (1999) |
| January 19 | 48.0°F (1975) | -25.1°F (1984) | 0.94 in (1974) |
| January 20 | 46.9°F (2005) | -27.9°F (2025) | 0.77 in (2012) |
| January 21 | 50.0°F (2014) | -16.1°F (1984) | 0.99 in (1993) |
| January 22 | 48.9°F (1981) | -13.0°F (2025) | 1.30 in (1993) |
| January 23 | 45.0°F (2005) | -20.9°F (2025) | 0.68 in (1999) |
| January 24 | 45.0°F (1982) | -13.0°F (1989) | 0.40 in (1996) |
| January 25 | 46.9°F (1992) | -15.0°F (1989) | 0.34 in (2001) |
| January 26 | 51.1°F (2015) | -14.1°F (1989) | 0.65 in (1997) |
| January 27 | 54.0°F (2015) | -20.0°F (2025) | 0.60 in (2008) |
| January 28 | 44.1°F (2005) | -25.1°F (1980) | 1.47 in (2021) |
| January 29 | 46.0°F (2015) | -23.1°F (1980) | 0.62 in (1981) |
| January 30 | 46.9°F (1976) | -20.9°F (1979) | 1.26 in (2008) |
| January 31 | 50.0°F (2024) | -20.9°F (1979) | 0.34 in (2006) |