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" |
Sioux Falls, SD Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Sioux Falls, SD Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Sioux Falls, SD Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Sioux Falls, SD
Sioux Falls, SD has no months that meet our "pleasant" threshold — every season has tradeoffs.