December weather in Reliance, SD
The average temperature in Reliance in December is 23.4°F (12.5°F–34.3°F). Average precipitation: 0.47 inches. Average snowfall is 7.2 inches.
December is a winter month in Reliance, and is cooler than the annual average of 48.1°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 8h 44m. For travel, December is cold.
Avg High
34.3°F
Avg Low
12.5°F
Precipitation
0.47 in
Snow
7.2 in
December records in Reliance
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.9°F (1998) | -16.1°F (1893) | 0.60 in (1913) |
| December 2 | 70.0°F (1916) | -20.0°F (1919) | 0.47 in (1933) |
| December 3 | 73.0°F (1948) | -16.1°F (1897) | 0.49 in (1955) |
| December 4 | 70.0°F (1975) | -18.0°F (1897) | 0.28 in (2013) |
| December 5 | 68.0°F (1939) | -16.1°F (2002) | 0.22 in (1936) |
| December 6 | 73.9°F (1939) | -20.9°F (1972) | 0.74 in (1951) |
| December 7 | 71.1°F (2023) | -20.9°F (2013) | 0.30 in (1951) |
| December 8 | 68.0°F (1939) | -22.0°F (1927) | 0.22 in (1893) |
| December 9 | 69.1°F (1939) | -22.0°F (1955) | 0.32 in (2012) |
| December 10 | 62.1°F (1895) | -27.0°F (1917) | 0.44 in (2021) |
| December 11 | 68.0°F (1939) | -17.0°F (1962) | 0.71 in (1965) |
| December 12 | 64.0°F (2014) | -25.1°F (1932) | 0.40 in (1902) |
| December 13 | 66.9°F (1920) | -29.0°F (1917) | 1.31 in (2022) |
| December 14 | 68.0°F (1998) | -23.1°F (1901) | 0.40 in (1922) |
| December 15 | 64.0°F (1939) | -25.1°F (1922) | 0.37 in (2014) |
| December 16 | 62.1°F (1939) | -27.9°F (1951) | 0.40 in (1921) |
| December 17 | 62.1°F (1939) | -34.1°F (1922) | 0.72 in (1908) |
| December 18 | 68.0°F (1979) | -29.9°F (1922) | 0.13 in (1968) |
| December 19 | 63.0°F (1894) | -24.0°F (1989) | 0.40 in (1921) |
| December 20 | 70.0°F (1941) | -35.0°F (1916) | 0.34 in (1902) |
| December 21 | 66.0°F (1933) | -32.1°F (1916) | 0.40 in (1920) |
| December 22 | 72.0°F (2020) | -29.0°F (1989) | 0.60 in (1968) |
| December 23 | 62.1°F (1936) | -31.0°F (1983) | 0.30 in (2014) |
| December 24 | 57.0°F (1907) | -23.1°F (1920) | 0.45 in (1982) |
| December 25 | 62.1°F (1928) | -18.0°F (1902) | 0.57 in (2016) |
| December 26 | 60.1°F (1907) | -26.0°F (1996) | 0.50 in (2009) |
| December 27 | 66.9°F (1928) | -22.0°F (1894) | 0.35 in (1946) |
| December 28 | 60.1°F (1898) | -25.1°F (1916) | 0.51 in (2019) |
| December 29 | 62.1°F (1999) | -31.0°F (1917) | 0.49 in (1972) |
| December 30 | 63.0°F (1904) | -29.9°F (1990) | 0.62 in (2024) |
| December 31 | 60.1°F (1904) | -29.0°F (2017) | 0.40 in (1924) |