Weather on September 30
Sioux Falls, SD
55 Years of Data
Avg High
72°F
Avg Low
46°F
Warmest
2023
76°F avg
Coldest
1974
36°F avg
About This Date
September 30th in Sioux Falls, SD typically brings pleasant fall weather, with average highs around 72°F and lows near 46°F — a 26°F daily swing. Over 55 years of records, the warmest September 30th was in 2023 (76°F average), while the coldest was 1974 (36°F) — a 40°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 30th dates historically, with the wettest September 30th recording 6.88" of rain. The last decade has been 6.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.2°F warmer on this date compared to 20-30 years ago.
Planning for September 30th in Sioux Falls, SD? Great weather for outdoor activities.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 64° | 72° | — | — |
| 2024 | 81° | 52° | 66° | — | — |
| 2023warmest | 93° | 59° | 76° | — | — |
| 2022 | 82° | 57° | 70° | — | — |
| 2021 | 72° | 62° | 67° | 2.54" | — |
| 2020 | 68° | 50° | 59° | — | — |
| 2019 | 86° | 56° | 71° | 0.13" | — |
| 2018 | 55° | 45° | 50° | — | — |
| 2017 | 72° | 53° | 62° | 0.13" | — |
| 2016 | 75° | 41° | 58° | — | — |
| 2015 | 67° | 49° | 58° | — | — |
| 2014 | 67° | 52° | 59° | 0.43" | — |
| 2013 | 83° | 57° | 70° | — | — |
| 2012 | 81° | 40° | 60° | — | — |
| 2011 | 69° | 40° | 54° | — | — |
| 2010 | 71° | 45° | 58° | — | — |
| 2009 | 69° | 43° | 56° | — | — |
| 2008 | 75° | 37° | 56° | — | — |
| 2007 | 73° | 54° | 63° | 0.41" | — |
| 2006 | 78° | 49° | 63° | — | — |
| 2005 | 79° | 50° | 64° | — | — |
| 2004 | 77° | 54° | 65° | 0.08" | — |
| 2003 | 58° | 33° | 45° | — | — |
| 2002 | 83° | 50° | 66° | 0.08" | — |
| 2001 | 78° | 53° | 66° | — | — |
| 2000 | 86° | 47° | 66° | — | — |
| 1999 | 63° | 38° | 50° | — | — |
| 1998 | 62° | 36° | 49° | — | — |
| 1997 | 76° | 39° | 57° | — | — |
| 1996 | 81° | 42° | 61° | — | — |
| 1995 | 67° | 48° | 57° | 1.7" | — |
| 1994 | 69° | 54° | 61° | — | — |
| 1993 | 76° | 46° | 61° | — | — |
| 1992 | 83° | 43° | 63° | — | — |
| 1991 | 66° | 51° | 59° | — | — |
| 1990 | 73° | 41° | 57° | — | — |
| 1989 | 85° | 59° | 72° | — | — |
| 1988 | 67° | 48° | 57° | — | — |
| 1987 | 71° | 44° | 58° | — | — |
| 1986 | 70° | 45° | 57° | — | — |
| 1985 | 46° | 31° | 38° | 0.1" | — |
| 1984 | 67° | 28° | 47° | — | — |
| 1983 | 83° | 65° | 74° | — | — |
| 1982 | 53° | 42° | 48° | 0.81" | — |
| 1981 | 57° | 47° | 52° | — | — |
| 1980 | 85° | 47° | 66° | — | — |
| 1979 | 79° | 40° | 59° | — | — |
| 1978 | 66° | 43° | 54° | — | — |
| 1977 | 58° | 49° | 53° | 6.88" | — |
| 1976 | 90° | 37° | 63° | — | — |
| 1975 | 57° | 33° | 45° | — | — |
| 1974coldest | 51° | 22° | 36° | — | — |
| 1973 | 65° | 50° | 57° | — | — |
| 1972 | 76° | 31° | 53° | — | — |
| 1971 | 81° | 58° | 69° | 0.71" | — |
55 years of data from SIOUX FALLS