Weather on January 21
Sioux Falls, SD
55 Years of Data
About This Date
January 21st in Sioux Falls, SD typically brings very cold winter weather, with average highs around 29°F and lows near 9°F. Over 56 years of records, the warmest January 21st was in 1989 (37°F average), while the coldest was 1978 (-3°F) — a 40°F range across recorded history. Precipitation has occurred on 29% of recorded January 21st dates, with snow falling 32% of the time (heaviest snowfall: 4.5"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for January 21st 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 |
|---|---|---|---|---|---|
| 2026 | 32° | 9° | 20° | 0.1" | 0.6" |
| 2025 | 27° | -14° | 7° | — | — |
| 2024 | 24° | 2° | 13° | — | — |
| 2023 | 27° | 13° | 20° | — | — |
| 2022 | 28° | 6° | 17° | 0.03" | 0.1" |
| 2021 | 37° | 17° | 27° | — | — |
| 2020 | 26° | 0° | 13° | — | — |
| 2019 | 21° | 5° | 13° | 0.03" | 0.1" |
| 2018 | 42° | 27° | 35° | 0.05" | 0.2" |
| 2017 | 37° | 31° | 34° | 0.08" | — |
| 2016 | 26° | 17° | 22° | 0.05" | 0.3" |
| 2015 | 31° | 26° | 29° | — | 0.1" |
| 2014 | 20° | -12° | 4° | — | 0.1" |
| 2013 | 3° | -9° | -3° | — | — |
| 2012 | 22° | -10° | 6° | — | — |
| 2011 | 16° | -7° | 4° | 0.03" | 0.1" |
| 2010 | 30° | 27° | 28° | — | — |
| 2009 | 38° | 17° | 27° | — | — |
| 2008 | 10° | 0° | 5° | 0.33" | 2.7" |
| 2007 | 30° | 21° | 26° | 0.43" | 2.8" |
| 2006 | 44° | 24° | 34° | — | — |
| 2005 | 32° | 10° | 21° | — | — |
| 2004 | 35° | 5° | 20° | — | — |
| 2003 | 9° | -8° | 1° | — | 0.2" |
| 2002 | 51° | 14° | 33° | — | — |
| 2001 | 18° | 1° | 9° | — | — |
| 2000 | 17° | -7° | 5° | — | — |
| 1999 | 34° | 21° | 27° | — | — |
| 1998 | 21° | 16° | 18° | 0.05" | 1" |
| 1997 | 39° | 33° | 36° | — | — |
| 1996 | 38° | 9° | 23° | — | — |
| 1995 | 16° | 9° | 12° | — | — |
| 1994 | 30° | 7° | 18° | — | — |
| 1993 | 37° | 7° | 22° | 0.1" | 0.3" |
| 1992 | 50° | 22° | 36° | — | — |
| 1991 | 13° | -9° | 2° | — | — |
| 1990 | 46° | 12° | 29° | — | — |
| 1989warmest | 49° | 26° | 37° | — | — |
| 1988 | 12° | -11° | 1° | — | — |
| 1987 | 36° | 13° | 24° | 0.08" | 0.5" |
| 1986 | 33° | 10° | 22° | 1.09" | 4.5" |
| 1985 | 21° | 8° | 15° | — | — |
| 1984 | 20° | -2° | 9° | — | — |
| 1983 | 29° | 10° | 19° | — | — |
| 1982 | 15° | 8° | 12° | 0.03" | 0.2" |
| 1981 | 47° | 11° | 29° | — | — |
| 1980 | 41° | 20° | 30° | — | — |
| 1979 | 23° | 9° | 16° | — | — |
| 1978coldest | 14° | -21° | -3° | — | — |
| 1977 | 25° | 1° | 13° | — | — |
| 1976 | 35° | 18° | 26° | — | — |
| 1975 | 35° | -6° | 15° | — | — |
| 1974 | 28° | 24° | 26° | — | — |
| 1973 | 28° | 27° | 27° | 0.81" | 4.5" |
| 1972 | 32° | -1° | 16° | — | — |
| 1971 | 34° | 23° | 28° | 0.08" | 0.4" |