Weather on August 31
Sioux Falls, SD
55 Years of Data
Avg High
81°F
Avg Low
58°F
Warmest
1990
81°F avg
Coldest
1974
52°F avg
About This Date
August 31st in Sioux Falls, SD typically brings warm summer weather, with average highs around 81°F and lows near 58°F. Over 55 years of records, the warmest August 31st was in 1990 (81°F average), while the coldest was 1974 (52°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 31st dates historically, with the wettest August 31st recording 10.13" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in Sioux Falls, SD? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 62° | 70° | — | — |
| 2024 | 87° | 56° | 71° | — | — |
| 2023 | 86° | 66° | 76° | — | — |
| 2022 | 91° | 56° | 73° | — | — |
| 2021 | 80° | 62° | 71° | 1.09" | — |
| 2020 | 77° | 53° | 65° | 0.33" | — |
| 2019 | 66° | 59° | 63° | 0.28" | — |
| 2018 | 82° | 68° | 75° | 0.03" | — |
| 2017 | 79° | 58° | 68° | — | — |
| 2016 | 84° | 54° | 69° | — | — |
| 2015 | 83° | 64° | 73° | — | — |
| 2014 | 82° | 61° | 71° | — | — |
| 2013 | 89° | 61° | 75° | 1.5" | — |
| 2012 | 86° | 61° | 73° | — | — |
| 2011 | 85° | 67° | 76° | — | — |
| 2010 | 77° | 59° | 68° | 3.1" | — |
| 2009 | 70° | 42° | 56° | — | — |
| 2008 | 87° | 69° | 78° | — | — |
| 2007 | 81° | 59° | 70° | — | — |
| 2006 | 76° | 61° | 68° | — | — |
| 2005 | 77° | 50° | 64° | — | — |
| 2004 | 84° | 62° | 73° | 2.08" | — |
| 2003 | 72° | 47° | 59° | — | — |
| 2002 | 85° | 68° | 76° | — | — |
| 2001 | 75° | 51° | 63° | — | — |
| 2000 | 82° | 58° | 70° | — | — |
| 1999 | 87° | 65° | 76° | — | — |
| 1998 | 72° | 54° | 63° | 0.08" | — |
| 1997 | 83° | 55° | 69° | — | — |
| 1996 | 83° | 65° | 74° | — | — |
| 1995 | 76° | 57° | 66° | — | — |
| 1994 | 68° | 50° | 59° | — | — |
| 1993 | 71° | 48° | 60° | — | — |
| 1992 | 74° | 45° | 59° | 0.1" | — |
| 1991 | 85° | 54° | 69° | — | — |
| 1990warmest | 93° | 68° | 81° | — | — |
| 1989 | 90° | 65° | 77° | — | — |
| 1988 | 89° | 62° | 76° | — | — |
| 1987 | 75° | 41° | 58° | — | — |
| 1986 | 83° | 62° | 72° | — | — |
| 1985 | 82° | 64° | 73° | — | — |
| 1984 | 85° | 51° | 68° | — | — |
| 1983 | 85° | 62° | 73° | — | — |
| 1982 | 84° | 63° | 73° | 10.13" | — |
| 1981 | 78° | 54° | 66° | — | — |
| 1980 | 64° | 55° | 60° | 1.68" | — |
| 1979 | 89° | 68° | 79° | 0.03" | — |
| 1978 | 83° | 60° | 71° | — | — |
| 1977 | 76° | 54° | 65° | — | — |
| 1976 | 81° | 58° | 69° | 0.08" | — |
| 1975 | 85° | 65° | 75° | 0.05" | — |
| 1974coldest | 63° | 41° | 52° | — | — |
| 1973 | 87° | 72° | 79° | — | — |
| 1972 | 72° | 50° | 61° | 0.08" | — |
| 1971 | 87° | 68° | 78° | — | — |
55 years of data from SIOUX FALLS