December weather in Summit, SD
The average temperature in Summit in December is 17.2°F (8.6°F–25.7°F). Average precipitation: 0.66 inches. Average snowfall is 11.9 inches.
December is a winter month in Summit, and is cooler than the annual average of 42.6°F. Daily temperatures swing about 17.1°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 33m. For travel, December is cold.
Avg High
25.7°F
Avg Low
8.6°F
Precipitation
0.66 in
Snow
11.9 in
December records in Summit
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.0°F (1998) | -17.0°F (2014) | 0.74 in (2007) |
| December 2 | 55.9°F (2012) | -20.0°F (1985) | 0.11 in (1968) |
| December 3 | 55.9°F (1998) | -23.1°F (1985) | 0.28 in (2010) |
| December 4 | 48.0°F (1967) | -18.0°F (1991) | 0.40 in (1971) |
| December 5 | 50.0°F (1967) | -17.0°F (2005) | 1.00 in (1960) |
| December 6 | 55.0°F (2023) | -20.0°F (1972) | 0.06 in (2004) |
| December 7 | 64.0°F (2023) | -20.9°F (2013) | 0.17 in (2012) |
| December 8 | 55.9°F (1990) | -18.9°F (1976) | 0.15 in (1995) |
| December 9 | 55.9°F (2006) | -24.0°F (1977) | 0.39 in (2012) |
| December 10 | 50.0°F (1979) | -24.0°F (1977) | 0.23 in (2025) |
| December 11 | 45.0°F (1967) | -20.9°F (2019) | 0.50 in (1965) |
| December 12 | 48.9°F (1998) | -22.0°F (2000) | 0.10 in (1983) |
| December 13 | 57.9°F (2021) | -25.1°F (1985) | 0.83 in (2022) |
| December 14 | 51.1°F (1998) | -26.0°F (1989) | 0.35 in (2022) |
| December 15 | 46.9°F (1986) | -24.0°F (1963) | 0.29 in (2022) |
| December 16 | 54.0°F (1962) | -24.0°F (1983) | 0.26 in (2010) |
| December 17 | 50.0°F (1962) | -24.0°F (1983) | 0.37 in (1967) |
| December 18 | 51.1°F (2011) | -27.9°F (2016) | 0.23 in (2002) |
| December 19 | 51.1°F (1979) | -33.0°F (1983) | 0.23 in (2024) |
| December 20 | 48.0°F (1979) | -31.0°F (1983) | 0.20 in (1983) |
| December 21 | 50.0°F (1979) | -32.1°F (1983) | 0.14 in (1967) |
| December 22 | 52.0°F (2020) | -31.0°F (1983) | 0.20 in (1968) |
| December 23 | 54.0°F (2023) | -34.1°F (1983) | 0.27 in (1996) |
| December 24 | 46.9°F (2023) | -34.1°F (1983) | 0.81 in (2023) |
| December 25 | 46.9°F (1994) | -34.1°F (1983) | 0.55 in (2023) |
| December 26 | 48.9°F (2011) | -27.0°F (1990) | 1.14 in (2023) |
| December 27 | 43.0°F (1986) | -25.1°F (1993) | 0.38 in (2018) |
| December 28 | 46.9°F (1980) | -25.1°F (1993) | 0.77 in (1959) |
| December 29 | 53.1°F (1999) | -20.9°F (1983) | 0.44 in (2019) |
| December 30 | 46.0°F (2004) | -33.0°F (1990) | 0.42 in (2005) |
| December 31 | 44.1°F (1999) | -34.1°F (1967) | 0.36 in (2010) |