Weather on September 26
Sioux Falls, SD
55 Years of Data
Avg High
73°F
Avg Low
45°F
Warmest
2008
77°F avg
Coldest
1984
38°F avg
About This Date
September 26th in Sioux Falls, SD typically brings pleasant fall weather, with average highs around 73°F and lows near 45°F — a 28°F daily swing. Over 55 years of records, the warmest September 26th was in 2008 (77°F average), while the coldest was 1984 (38°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 26th dates historically, with the wettest September 26th recording 2.11" of rain. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for September 26th in Sioux Falls, SD? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 50° | 69° | — | — |
| 2024 | 84° | 49° | 66° | — | — |
| 2023 | 72° | 52° | 62° | — | — |
| 2022 | 71° | 42° | 57° | — | — |
| 2021 | 89° | 57° | 73° | — | — |
| 2020 | 77° | 51° | 64° | — | — |
| 2019 | 68° | 44° | 56° | — | — |
| 2018 | 66° | 43° | 54° | — | — |
| 2017 | 63° | 44° | 53° | 0.53" | — |
| 2016 | 72° | 43° | 57° | — | — |
| 2015 | 78° | 52° | 65° | — | — |
| 2014 | 83° | 57° | 70° | — | — |
| 2013 | 85° | 63° | 74° | — | — |
| 2012 | 73° | 33° | 53° | — | — |
| 2011 | 72° | 38° | 55° | — | — |
| 2010 | 65° | 41° | 53° | — | — |
| 2009 | 72° | 44° | 58° | — | — |
| 2008warmest | 89° | 65° | 77° | — | — |
| 2007 | 75° | 42° | 59° | — | — |
| 2006 | 80° | 38° | 59° | — | — |
| 2005 | 70° | 45° | 57° | — | — |
| 2004 | 80° | 52° | 66° | — | — |
| 2003 | 67° | 48° | 57° | 0.43" | — |
| 2002 | 60° | 37° | 49° | 0.15" | — |
| 2001 | 71° | 34° | 52° | — | — |
| 2000 | 77° | 44° | 61° | — | — |
| 1999 | 71° | 47° | 59° | — | — |
| 1998 | 84° | 62° | 73° | 0.2" | — |
| 1997 | 77° | 46° | 62° | — | — |
| 1996 | 53° | 45° | 49° | 0.08" | — |
| 1995 | 78° | 39° | 59° | — | — |
| 1994 | 63° | 38° | 50° | — | — |
| 1993 | 59° | 33° | 46° | — | — |
| 1992 | 66° | 45° | 55° | — | — |
| 1991 | 67° | 33° | 50° | — | — |
| 1990 | 92° | 43° | 67° | — | — |
| 1989 | 65° | 30° | 47° | — | — |
| 1988 | 83° | 55° | 69° | — | — |
| 1987 | 89° | 62° | 76° | — | — |
| 1986 | 77° | 56° | 66° | — | — |
| 1985 | 55° | 29° | 42° | — | — |
| 1984coldest | 54° | 23° | 38° | — | — |
| 1983 | 88° | 43° | 65° | — | — |
| 1982 | 71° | 50° | 61° | — | — |
| 1981 | 69° | 47° | 58° | 0.43" | — |
| 1980 | 75° | 32° | 54° | — | — |
| 1979 | 80° | 58° | 69° | — | — |
| 1978 | 84° | 52° | 68° | — | — |
| 1977 | 69° | 47° | 58° | — | — |
| 1976 | 68° | 44° | 56° | 0.79" | — |
| 1975 | 73° | 41° | 57° | — | — |
| 1974 | 91° | 41° | 66° | — | — |
| 1973 | 59° | 53° | 56° | 2.11" | — |
| 1972 | 57° | 35° | 46° | — | — |
| 1971 | 75° | 55° | 65° | — | — |
55 years of data from SIOUX FALLS