December weather in Spearfish, SD
The average temperature in Spearfish in December is 27.3°F (17.5°F–37.2°F). Average precipitation: 0.72 inches. Average snowfall is 14.9 inches.
December is a winter month in Spearfish, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 19.7°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 8h 39m. For travel, December is cold.
Avg High
37.2°F
Avg Low
17.5°F
Precipitation
0.72 in
Snow
14.9 in
December records in Spearfish
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 70.0°F (1932) | -16.1°F (1919) | 1.54 in (2019) |
| December 2 | 73.0°F (1920) | -11.0°F (1980) | 1.25 in (1902) |
| December 3 | 70.0°F (1941) | -11.9°F (1985) | 0.40 in (1927) |
| December 4 | 66.9°F (1941) | -5.1°F (1972) | 0.80 in (2002) |
| December 5 | 73.0°F (1939) | -18.9°F (1972) | 1.45 in (1983) |
| December 6 | 72.0°F (1939) | -20.0°F (1972) | 1.00 in (1951) |
| December 7 | 62.1°F (1939) | -18.9°F (1972) | 1.12 in (1951) |
| December 8 | 68.0°F (1939) | -25.1°F (1977) | 0.20 in (1914) |
| December 9 | 66.9°F (1939) | -24.0°F (1932) | 0.22 in (1986) |
| December 10 | 69.1°F (1939) | -20.0°F (1932) | 0.70 in (1903) |
| December 11 | 69.1°F (1939) | -20.0°F (1932) | 1.45 in (1949) |
| December 12 | 72.0°F (1921) | -25.1°F (1932) | 0.41 in (1992) |
| December 13 | 70.0°F (1921) | -25.1°F (1917) | 0.53 in (1937) |
| December 14 | 70.0°F (1997) | -20.0°F (1926) | 0.93 in (2022) |
| December 15 | 63.0°F (1952) | -18.9°F (1951) | 0.23 in (2022) |
| December 16 | 64.0°F (1962) | -20.9°F (1964) | 2.00 in (1921) |
| December 17 | 63.0°F (1962) | -23.1°F (1964) | 0.42 in (1968) |
| December 18 | 68.0°F (1931) | -27.9°F (1924) | 0.27 in (1973) |
| December 19 | 70.0°F (1979) | -23.1°F (1990) | 0.38 in (1921) |
| December 20 | 69.1°F (1941) | -29.9°F (1916) | 0.39 in (1944) |
| December 21 | 70.0°F (1904) | -25.1°F (1990) | 1.00 in (1911) |
| December 22 | 68.0°F (1919) | -25.1°F (1920) | 0.40 in (1969) |
| December 23 | 63.0°F (1955) | -25.1°F (1983) | 0.62 in (1902) |
| December 24 | 60.1°F (1955) | -24.0°F (1983) | 0.40 in (1893) |
| December 25 | 68.0°F (1931) | -27.9°F (1983) | 0.83 in (2009) |
| December 26 | 64.9°F (2025) | -15.0°F (2017) | 0.69 in (2023) |
| December 27 | 61.0°F (1980) | -20.9°F (1983) | 0.55 in (2023) |
| December 28 | 66.9°F (1980) | -31.0°F (1983) | 0.58 in (1955) |
| December 29 | 68.0°F (1965) | -25.1°F (1990) | 0.60 in (1915) |
| December 30 | 63.0°F (1904) | -29.9°F (1968) | 0.58 in (1917) |
| December 31 | 64.0°F (1926) | -25.1°F (1923) | 0.99 in (2018) |