Weather on April 21
Sioux Falls, SD
55 Years of Data
Avg High
61°F
Avg Low
36°F
Warmest
1980
77°F avg
Coldest
1992
28°F avg
About This Date
April 21st in Sioux Falls, SD typically brings mild spring weather, with average highs around 61°F and lows near 36°F — a 25°F daily swing. Over 55 years of records, the warmest April 21st was in 1980 (77°F average), while the coldest was 1992 (28°F) — a 49°F range across recorded history. Precipitation has occurred on 45% of recorded April 21st dates, with snow falling 9% of the time (heaviest snowfall: 3.6"). The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Sioux Falls, SD? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 29° | 51° | 0.28" | — |
| 2024 | 63° | 27° | 45° | — | — |
| 2023 | 42° | 31° | 37° | 0.08" | 0.4" |
| 2022 | 65° | 31° | 48° | — | — |
| 2021 | 50° | 20° | 35° | — | 0.1" |
| 2020 | 73° | 27° | 50° | — | — |
| 2019 | 80° | 51° | 66° | — | — |
| 2018 | 51° | 37° | 44° | — | — |
| 2017 | 62° | 33° | 48° | — | — |
| 2016 | 69° | 44° | 57° | 0.15" | — |
| 2015 | 53° | 29° | 41° | — | — |
| 2014 | 69° | 36° | 52° | — | — |
| 2013 | 53° | 35° | 44° | 0.1" | — |
| 2012 | 68° | 44° | 56° | 0.1" | — |
| 2011 | 44° | 28° | 36° | 0.18" | — |
| 2010 | 71° | 38° | 54° | — | — |
| 2009 | 65° | 34° | 49° | — | — |
| 2008 | 58° | 37° | 47° | — | — |
| 2007 | 83° | 60° | 71° | 0.13" | — |
| 2006 | 64° | 42° | 53° | 0.03" | — |
| 2005 | 60° | 50° | 55° | 2.16" | — |
| 2004 | 62° | 38° | 50° | 0.25" | — |
| 2003 | 64° | 37° | 51° | — | — |
| 2002 | 37° | 32° | 35° | 1.02" | 3.5" |
| 2001 | 55° | 37° | 46° | 0.74" | — |
| 2000 | 67° | 27° | 47° | — | — |
| 1999 | 51° | 40° | 45° | 0.51" | — |
| 1998 | 63° | 33° | 48° | — | — |
| 1997 | 58° | 41° | 49° | — | — |
| 1996 | 57° | 32° | 45° | 0.41" | — |
| 1995 | 57° | 34° | 45° | — | — |
| 1994 | 63° | 41° | 52° | — | — |
| 1993 | 57° | 28° | 43° | — | — |
| 1992coldest | 31° | 26° | 28° | 0.81" | 2.6" |
| 1991 | 61° | 29° | 45° | — | — |
| 1990 | 82° | 40° | 61° | — | — |
| 1989 | 83° | 40° | 61° | — | — |
| 1988 | 42° | 31° | 36° | 0.91" | 3.6" |
| 1987 | 58° | 38° | 48° | — | — |
| 1986 | 48° | 30° | 39° | — | — |
| 1985 | 83° | 52° | 67° | 1.57" | — |
| 1984 | 55° | 37° | 46° | 0.69" | — |
| 1983 | 63° | 44° | 53° | — | — |
| 1982 | 50° | 28° | 39° | 0.48" | — |
| 1981 | 66° | 45° | 55° | 0.13" | — |
| 1980warmest | 93° | 61° | 77° | — | — |
| 1979 | 68° | 31° | 49° | — | — |
| 1978 | 57° | 24° | 41° | — | — |
| 1977 | 63° | 38° | 50° | — | — |
| 1976 | 64° | 33° | 49° | 0.08" | — |
| 1975 | 55° | 33° | 44° | 0.2" | — |
| 1974 | 57° | 36° | 46° | 0.05" | — |
| 1973 | 58° | 39° | 48° | — | — |
| 1972 | 45° | 33° | 39° | 0.86" | — |
| 1971 | 65° | 45° | 55° | 0.28" | — |
55 years of data from SIOUX FALLS