January weather in Watertown, WI
The average temperature in Watertown in January is 18.4°F (10.5°F–26.4°F). Average precipitation: 1.37 inches. Average snowfall is 11.0 inches.
January is a winter month in Watertown, and is cooler than the annual average of 46.4°F. Daily temperatures swing about 15.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 9m. For travel, January is cold.
Avg High
26.4°F
Avg Low
10.5°F
Precipitation
1.37 in
Snow
11.0 in
January records in Watertown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.9°F (1897) | -15.0°F (1969) | 0.77 in (1985) |
| January 2 | 54.0°F (1897) | -18.9°F (1979) | 0.91 in (1941) |
| January 3 | 55.0°F (1897) | -18.9°F (1904) | 1.04 in (2006) |
| January 4 | 52.0°F (1998) | -24.0°F (1919) | 0.94 in (1982) |
| January 5 | 48.9°F (2007) | -23.1°F (1924) | 1.58 in (1939) |
| January 6 | 48.9°F (1946) | -24.0°F (1909) | 0.87 in (1946) |
| January 7 | 46.9°F (2008) | -26.0°F (1910) | 0.55 in (1918) |
| January 8 | 55.0°F (2008) | -22.0°F (1942) | 1.16 in (1937) |
| January 9 | 55.9°F (2026) | -22.0°F (1977) | 0.59 in (2008) |
| January 10 | 53.1°F (1975) | -27.9°F (1982) | 0.37 in (1975) |
| January 11 | 53.1°F (1975) | -26.0°F (1979) | 0.38 in (1926) |
| January 12 | 53.1°F (2012) | -25.1°F (1912) | 0.60 in (1905) |
| January 13 | 52.0°F (1961) | -26.0°F (1912) | 0.77 in (2005) |
| January 14 | 53.1°F (2026) | -27.9°F (1893) | 0.62 in (1979) |
| January 15 | 53.1°F (1953) | -31.0°F (1963) | 0.67 in (1952) |
| January 16 | 50.0°F (1949) | -24.0°F (1994) | 1.90 in (1897) |
| January 17 | 54.0°F (1894) | -27.0°F (1982) | 0.59 in (2017) |
| January 18 | 54.0°F (1996) | -27.0°F (1994) | 0.70 in (2011) |
| January 19 | 57.0°F (1996) | -31.0°F (1994) | 0.81 in (1907) |
| January 20 | 57.0°F (1906) | -29.0°F (1994) | 0.92 in (1988) |
| January 21 | 50.0°F (1964) | -29.0°F (1994) | 11.11 in (1929) |
| January 22 | 53.1°F (1964) | -25.1°F (1936) | 0.50 in (2018) |
| January 23 | 50.0°F (1909) | -26.0°F (1963) | 1.19 in (1938) |
| January 24 | 52.0°F (1950) | -22.0°F (1897) | 0.73 in (1938) |
| January 25 | 55.0°F (1950) | -29.9°F (1904) | 0.48 in (1950) |
| January 26 | 60.1°F (1944) | -23.1°F (2019) | 0.79 in (1950) |
| January 27 | 55.0°F (1944) | -25.1°F (1904) | 1.58 in (1916) |
| January 28 | 54.0°F (2002) | -20.0°F (1902) | 0.98 in (1944) |
| January 29 | 46.0°F (2006) | -24.0°F (1966) | 1.20 in (2006) |
| January 30 | 55.9°F (2013) | -29.0°F (1951) | 1.47 in (1947) |
| January 31 | 55.0°F (2025) | -27.9°F (2019) | 0.49 in (1946) |