Weather on September 17
Sioux Falls, SD
55 Years of Data
Avg High
75°F
Avg Low
51°F
Warmest
2019
82°F avg
Coldest
1971
48°F avg
About This Date
September 17th in Sioux Falls, SD typically brings pleasant fall weather, with average highs around 75°F and lows near 51°F. Over 55 years of records, the warmest September 17th was in 2019 (82°F average), while the coldest was 1971 (48°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 17th dates historically, with the wettest September 17th recording 0.89" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for September 17th in Sioux Falls, SD? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 63° | 68° | 0.05" | — |
| 2024 | 86° | 70° | 78° | 0.03" | — |
| 2023 | 77° | 44° | 61° | — | — |
| 2022 | 85° | 61° | 73° | 0.15" | — |
| 2021 | 74° | 51° | 62° | 0.03" | — |
| 2020 | 69° | 41° | 55° | — | — |
| 2019warmest | 88° | 76° | 82° | — | — |
| 2018 | 77° | 64° | 71° | — | — |
| 2017 | 68° | 41° | 55° | — | — |
| 2016 | 76° | 57° | 66° | — | — |
| 2015 | 80° | 55° | 68° | — | — |
| 2014 | 80° | 48° | 64° | — | — |
| 2013 | 66° | 56° | 61° | 0.03" | — |
| 2012 | 66° | 42° | 54° | 0.03" | — |
| 2011 | 59° | 50° | 55° | — | — |
| 2010 | 69° | 50° | 60° | — | — |
| 2009 | 83° | 54° | 68° | — | — |
| 2008 | 85° | 48° | 66° | — | — |
| 2007 | 90° | 64° | 77° | — | — |
| 2006 | 60° | 45° | 52° | — | — |
| 2005 | 69° | 54° | 61° | 0.1" | — |
| 2004 | 64° | 57° | 61° | 0.3" | — |
| 2003 | 81° | 57° | 69° | — | — |
| 2002 | 78° | 55° | 67° | — | — |
| 2001 | 64° | 47° | 55° | — | — |
| 2000 | 92° | 51° | 71° | — | — |
| 1999 | 76° | 51° | 63° | — | — |
| 1998 | 84° | 55° | 70° | — | — |
| 1997 | 79° | 47° | 63° | — | — |
| 1996 | 69° | 44° | 57° | — | — |
| 1995 | 67° | 45° | 56° | — | — |
| 1994 | 78° | 46° | 62° | — | — |
| 1993 | 53° | 48° | 51° | 0.69" | — |
| 1992 | 73° | 50° | 62° | — | — |
| 1991 | 67° | 45° | 56° | 0.05" | — |
| 1990 | 68° | 47° | 57° | — | — |
| 1989 | 85° | 54° | 69° | — | — |
| 1988 | 88° | 56° | 72° | — | — |
| 1987 | 71° | 52° | 61° | 0.03" | — |
| 1986 | 74° | 60° | 67° | — | — |
| 1985 | 78° | 67° | 72° | 0.15" | — |
| 1984 | 78° | 52° | 65° | — | — |
| 1983 | 88° | 51° | 69° | 0.03" | — |
| 1982 | 63° | 47° | 55° | 0.13" | — |
| 1981 | 66° | 33° | 50° | — | — |
| 1980 | 72° | 35° | 53° | — | — |
| 1979 | 86° | 57° | 72° | — | — |
| 1978 | 65° | 44° | 54° | 0.81" | — |
| 1977 | 78° | 60° | 69° | — | — |
| 1976 | 78° | 52° | 65° | — | — |
| 1975 | 70° | 56° | 63° | 0.89" | — |
| 1974 | 82° | 51° | 67° | — | — |
| 1973 | 61° | 39° | 50° | 0.05" | — |
| 1972 | 85° | 45° | 65° | — | — |
| 1971coldest | 61° | 35° | 48° | — | — |
55 years of data from SIOUX FALLS