Weather on December 20
Sioux Falls, SD
55 Years of Data
About This Date
December 20th in Sioux Falls, SD typically brings very cold winter weather, with average highs around 28°F and lows near 10°F. Over 55 years of records, the warmest December 20th was in 1979 (41°F average), while the coldest was 1983 (-12°F) — a 53°F range across recorded history. Precipitation has occurred on 22% of recorded December 20th dates, with snow falling 22% of the time (heaviest snowfall: 4.1"). The last decade has been 5.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.8°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Sioux Falls, SD? Bundle up with warm layers and protect extremities from the cold. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 39° | 12° | 26° | — | — |
| 2024 | 17° | 2° | 10° | — | — |
| 2023 | 46° | 20° | 33° | — | — |
| 2022 | 2° | -6° | -2° | — | — |
| 2021 | 28° | 11° | 20° | — | — |
| 2020 | 45° | 19° | 32° | — | — |
| 2019 | 34° | 13° | 24° | — | — |
| 2018 | 42° | 23° | 33° | — | — |
| 2017 | 37° | 23° | 30° | — | — |
| 2016 | 40° | 24° | 32° | — | — |
| 2015 | 36° | 24° | 30° | — | — |
| 2014 | 32° | 30° | 31° | — | — |
| 2013 | 14° | 6° | 10° | — | — |
| 2012 | 19° | 6° | 13° | — | — |
| 2011 | 36° | 5° | 20° | — | — |
| 2010 | 32° | 22° | 27° | 0.48" | 2.8" |
| 2009 | 28° | 20° | 24° | 0.03" | 0.2" |
| 2008 | 17° | -6° | 6° | 0.41" | 2.3" |
| 2007 | 33° | 14° | 24° | — | — |
| 2006 | 37° | 33° | 35° | 0.48" | — |
| 2005 | 19° | 4° | 11° | — | — |
| 2004 | 40° | 18° | 29° | 0.1" | 0.2" |
| 2003 | 41° | 25° | 33° | — | — |
| 2002 | 33° | 25° | 29° | 0.03" | 0.2" |
| 2001 | 40° | 17° | 28° | — | — |
| 2000 | 26° | 1° | 14° | — | 0.1" |
| 1999 | 11° | -6° | 3° | — | — |
| 1998 | 6° | 1° | 4° | 0.1" | 1.4" |
| 1997 | 34° | 11° | 22° | — | — |
| 1996 | 29° | -15° | 7° | — | — |
| 1995 | 28° | 24° | 26° | — | — |
| 1994 | 33° | 21° | 27° | — | — |
| 1993 | 26° | 9° | 17° | — | — |
| 1992 | 30° | -2° | 14° | — | — |
| 1991 | 39° | 22° | 30° | — | — |
| 1990 | 3° | -13° | -5° | 0.08" | 1" |
| 1989 | -1° | -19° | -10° | — | 0.2" |
| 1988 | 35° | 17° | 26° | — | — |
| 1987 | 35° | 16° | 25° | — | — |
| 1986 | 35° | 8° | 22° | — | — |
| 1985 | 3° | -14° | -5° | — | — |
| 1984 | 36° | 10° | 23° | — | — |
| 1983coldest | -4° | -21° | -12° | 0.36" | 4.1" |
| 1982 | 30° | 19° | 25° | — | — |
| 1981 | 33° | 6° | 20° | 0.15" | — |
| 1980 | 12° | -8° | 2° | — | — |
| 1979warmest | 49° | 33° | 41° | — | — |
| 1978 | 26° | 13° | 19° | 0.25" | 0.8" |
| 1977 | 15° | 7° | 11° | 0.08" | 0.7" |
| 1976 | 16° | -1° | 8° | — | — |
| 1975 | 34° | 6° | 20° | — | — |
| 1974 | 25° | 5° | 15° | — | — |
| 1973 | 16° | -12° | 2° | — | — |
| 1972 | 34° | 23° | 28° | — | — |
| 1971 | 33° | 21° | 27° | — | — |