Weather on May 20
Sioux Falls, SD
55 Years of Data
About This Date
May 20th in Sioux Falls, SD typically brings pleasant spring weather, with average highs around 72°F and lows near 48°F. Over 56 years of records, the warmest May 20th was in 1972 (75°F average), while the coldest was 2017 (44°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 32% of May 20th dates historically, with the wettest May 20th recording 4.8" of rain. The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in Sioux Falls, SD? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 61° | 31° | 46° | — | — |
| 2025 | 53° | 42° | 48° | 0.25" | — |
| 2024 | 78° | 53° | 66° | 0.08" | — |
| 2023 | 74° | 36° | 55° | — | — |
| 2022 | 60° | 46° | 53° | 0.03" | — |
| 2021 | 73° | 64° | 69° | — | — |
| 2020 | 69° | 57° | 63° | — | — |
| 2019 | 58° | 33° | 45° | — | — |
| 2018 | 60° | 48° | 54° | 0.05" | — |
| 2017coldest | 46° | 41° | 44° | 1.68" | — |
| 2016 | 65° | 48° | 56° | — | — |
| 2015 | 60° | 45° | 52° | — | — |
| 2014 | 79° | 48° | 63° | — | — |
| 2013 | 67° | 55° | 61° | — | — |
| 2012 | 67° | 49° | 58° | 0.91" | — |
| 2011 | 65° | 58° | 61° | 2.13" | — |
| 2010 | 77° | 45° | 61° | — | — |
| 2009 | 90° | 61° | 75° | — | — |
| 2008 | 68° | 43° | 55° | — | — |
| 2007 | 84° | 53° | 69° | — | — |
| 2006 | 80° | 47° | 63° | — | — |
| 2005 | 81° | 52° | 66° | — | — |
| 2004 | 70° | 57° | 63° | — | — |
| 2003 | 60° | 35° | 48° | — | — |
| 2002 | 63° | 31° | 47° | — | — |
| 2001 | 68° | 43° | 55° | 0.43" | — |
| 2000 | 75° | 42° | 59° | — | — |
| 1999 | 69° | 56° | 62° | 4.8" | — |
| 1998 | 80° | 57° | 69° | 0.03" | — |
| 1997 | 60° | 33° | 47° | — | — |
| 1996 | 71° | 51° | 61° | 0.33" | — |
| 1995 | 67° | 45° | 56° | — | — |
| 1994 | 85° | 58° | 71° | — | — |
| 1993 | 64° | 36° | 50° | — | — |
| 1992 | 83° | 63° | 73° | — | — |
| 1991 | 71° | 56° | 63° | — | — |
| 1990 | 58° | 43° | 50° | — | — |
| 1989 | 75° | 37° | 56° | — | — |
| 1988 | 77° | 60° | 69° | 1.35" | — |
| 1987 | 81° | 63° | 72° | 0.56" | — |
| 1986 | 70° | 42° | 56° | — | — |
| 1985 | 71° | 39° | 55° | — | — |
| 1984 | 82° | 47° | 64° | — | — |
| 1983 | 67° | 44° | 55° | — | — |
| 1982 | 67° | 56° | 61° | 0.1" | — |
| 1981 | 77° | 39° | 58° | — | — |
| 1980 | 74° | 43° | 58° | — | — |
| 1979 | 63° | 44° | 53° | 0.05" | — |
| 1978 | 69° | 45° | 57° | — | — |
| 1977 | 75° | 60° | 68° | 0.28" | — |
| 1976 | 87° | 56° | 71° | — | — |
| 1975 | 93° | 57° | 75° | 0.23" | — |
| 1974 | 86° | 64° | 75° | 0.15" | — |
| 1973 | 85° | 40° | 62° | — | — |
| 1972warmest | 86° | 65° | 75° | — | — |
| 1971 | 72° | 36° | 54° | — | — |
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.