Weather on September 23
Sioux Falls, SD
55 Years of Data
Avg High
70°F
Avg Low
45°F
Warmest
2007
76°F avg
Coldest
1989
41°F avg
About This Date
September 23rd in Sioux Falls, SD typically brings pleasant fall weather, with average highs around 70°F and lows near 45°F — a 25°F daily swing. Over 55 years of records, the warmest September 23rd was in 2007 (76°F average), while the coldest was 1989 (41°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 23rd dates historically, with the wettest September 23rd recording 3.61" of rain. The last decade has been 13.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 13.0°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Sioux Falls, SD? Great weather for outdoor activities.
Warming Trend
2.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 54° | 66° | — | — |
| 2024 | 73° | 42° | 58° | 0.03" | — |
| 2023 | 79° | 60° | 69° | 0.25" | — |
| 2022 | 67° | 53° | 60° | 0.56" | — |
| 2021 | 78° | 51° | 65° | — | — |
| 2020 | 89° | 61° | 75° | — | — |
| 2019 | 79° | 48° | 63° | — | — |
| 2018 | 78° | 52° | 65° | — | — |
| 2017 | 76° | 59° | 67° | 0.05" | — |
| 2016 | 86° | 66° | 76° | 1.78" | — |
| 2015 | 72° | 64° | 68° | 1.02" | — |
| 2014 | 63° | 57° | 60° | 0.33" | — |
| 2013 | 78° | 57° | 68° | — | — |
| 2012 | 66° | 27° | 46° | — | — |
| 2011 | 67° | 30° | 48° | — | — |
| 2010 | 74° | 50° | 62° | 3.61" | — |
| 2009 | 69° | 53° | 61° | — | — |
| 2008 | 76° | 53° | 64° | 0.05" | — |
| 2007warmest | 89° | 62° | 76° | — | — |
| 2006 | 58° | 51° | 54° | 0.25" | — |
| 2005 | 75° | 44° | 60° | — | — |
| 2004 | 67° | 52° | 59° | 0.97" | — |
| 2003 | 79° | 38° | 58° | — | — |
| 2002 | 59° | 34° | 46° | — | — |
| 2001 | 61° | 36° | 48° | — | — |
| 2000 | 47° | 37° | 42° | — | — |
| 1999 | 79° | 41° | 60° | — | — |
| 1998 | 63° | 42° | 52° | — | — |
| 1997 | 67° | 44° | 55° | — | — |
| 1996 | 66° | 42° | 54° | — | — |
| 1995 | 65° | 44° | 54° | — | — |
| 1994 | 61° | 45° | 53° | 0.1" | — |
| 1993 | 63° | 35° | 49° | — | — |
| 1992 | 76° | 47° | 61° | — | — |
| 1991 | 57° | 34° | 45° | 1.73" | — |
| 1990 | 64° | 33° | 49° | — | — |
| 1989coldest | 56° | 27° | 41° | — | — |
| 1988 | 70° | 39° | 54° | — | — |
| 1987 | 81° | 40° | 60° | — | — |
| 1986 | 70° | 50° | 60° | — | — |
| 1985 | 52° | 38° | 45° | 0.46" | — |
| 1984 | 59° | 42° | 51° | — | — |
| 1983 | 66° | 28° | 47° | — | — |
| 1982 | 76° | 46° | 61° | — | — |
| 1981 | 77° | 52° | 64° | 0.03" | — |
| 1980 | 66° | 34° | 50° | — | — |
| 1979 | 75° | 49° | 62° | — | — |
| 1978 | 77° | 50° | 64° | — | — |
| 1977 | 75° | 52° | 63° | 0.99" | — |
| 1976 | 63° | 29° | 46° | — | — |
| 1975 | 66° | 42° | 54° | — | — |
| 1974 | 79° | 49° | 64° | — | — |
| 1973 | 72° | 40° | 56° | — | — |
| 1972 | 73° | 43° | 58° | — | — |
| 1971 | 71° | 33° | 52° | — | — |
55 years of data from SIOUX FALLS