December weather in Watertown, SD
The average temperature in Watertown in December is 17.8°F (9.3°F–26.3°F). Average precipitation: 0.68 inches. Average snowfall is 8.9 inches.
December is a winter month in Watertown, and is cooler than the annual average of 43°F. Daily temperatures swing about 17°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 8h 36m. For travel, December is cold.
Avg High
26.3°F
Avg Low
9.3°F
Precipitation
0.68 in
Snow
8.9 in
December records in Watertown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 59.0°F (1998) | -22.0°F (1893) | 0.50 in (2007) |
| December 2 | 57.9°F (1907) | -16.1°F (1940) | 0.54 in (1909) |
| December 3 | 64.0°F (1941) | -16.1°F (1985) | 1.33 in (1953) |
| December 4 | 57.0°F (1916) | -18.0°F (1927) | 0.90 in (1960) |
| December 5 | 59.0°F (1939) | -17.0°F (2005) | 0.22 in (1936) |
| December 6 | 69.1°F (1939) | -25.1°F (1972) | 0.17 in (1935) |
| December 7 | 61.0°F (2023) | -22.9°F (2013) | 0.60 in (1927) |
| December 8 | 57.0°F (1990) | -27.0°F (1927) | 0.67 in (1924) |
| December 9 | 59.0°F (1939) | -24.0°F (1927) | 0.35 in (1918) |
| December 10 | 53.1°F (1928) | -20.0°F (1917) | 0.47 in (1949) |
| December 11 | 55.0°F (1939) | -20.0°F (1917) | 0.69 in (1965) |
| December 12 | 57.0°F (1913) | -24.0°F (1932) | 0.95 in (1909) |
| December 13 | 57.0°F (1913) | -32.1°F (1917) | 0.41 in (2022) |
| December 14 | 57.0°F (1913) | -33.0°F (1917) | 1.10 in (1955) |
| December 15 | 55.9°F (1939) | -24.0°F (1917) | 0.80 in (1902) |
| December 16 | 57.9°F (1939) | -24.0°F (1914) | 0.25 in (1904) |
| December 17 | 57.9°F (1939) | -28.8°F (2016) | 0.55 in (1977) |
| December 18 | 55.9°F (1923) | -36.8°F (2016) | 0.15 in (1961) |
| December 19 | 52.0°F (1894) | -27.9°F (1955) | 0.18 in (1968) |
| December 20 | 55.0°F (1941) | -29.9°F (1916) | 0.55 in (2010) |
| December 21 | 55.0°F (1900) | -31.0°F (1916) | 0.50 in (1918) |
| December 22 | 55.0°F (2020) | -29.0°F (1916) | 0.65 in (1968) |
| December 23 | 51.1°F (1899) | -29.9°F (1983) | 0.32 in (2023) |
| December 24 | 46.0°F (2023) | -27.9°F (1983) | 0.58 in (2023) |
| December 25 | 48.9°F (1943) | -24.0°F (1902) | 0.52 in (2016) |
| December 26 | 50.0°F (2011) | -27.9°F (1996) | 0.15 in (1959) |
| December 27 | 50.0°F (1928) | -27.0°F (1924) | 0.25 in (1946) |
| December 28 | 48.0°F (2024) | -24.0°F (1924) | 0.49 in (2019) |
| December 29 | 53.1°F (1999) | -32.1°F (1917) | 0.89 in (2005) |
| December 30 | 48.9°F (2004) | -29.0°F (1990) | 0.65 in (2006) |
| December 31 | 51.1°F (1904) | -33.0°F (1967) | 0.35 in (2010) |