Weather on September 12
Sioux Falls, SD
55 Years of Data
Avg High
76°F
Avg Low
53°F
Warmest
1990
81°F avg
Coldest
1974
44°F avg
About This Date
September 12th in Sioux Falls, SD typically brings pleasant fall weather, with average highs around 76°F and lows near 53°F. Over 55 years of records, the warmest September 12th was in 1990 (81°F average), while the coldest was 1974 (44°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 35% of September 12th dates historically, with the wettest September 12th recording 4.01" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for September 12th in Sioux Falls, SD? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 66° | 78° | — | — |
| 2024 | 86° | 62° | 74° | — | — |
| 2023 | 77° | 49° | 63° | 0.03" | — |
| 2022 | 81° | 43° | 62° | — | — |
| 2021 | 76° | 57° | 66° | 0.1" | — |
| 2020 | 69° | 53° | 61° | 0.15" | — |
| 2019 | 74° | 58° | 66° | 2.74" | — |
| 2018 | 85° | 65° | 75° | — | — |
| 2017 | 85° | 60° | 72° | — | — |
| 2016 | 69° | 60° | 65° | — | — |
| 2015 | 70° | 39° | 54° | — | — |
| 2014 | 56° | 38° | 47° | 0.1" | — |
| 2013 | 78° | 53° | 66° | — | — |
| 2012 | 67° | 51° | 59° | 0.74" | — |
| 2011 | 90° | 55° | 72° | — | — |
| 2010 | 83° | 45° | 64° | — | — |
| 2009 | 77° | 59° | 68° | — | — |
| 2008 | 72° | 51° | 61° | — | — |
| 2007 | 72° | 39° | 55° | — | — |
| 2006 | 72° | 44° | 58° | — | — |
| 2005 | 83° | 66° | 74° | 0.86" | — |
| 2004 | 89° | 62° | 76° | — | — |
| 2003 | 80° | 45° | 62° | — | — |
| 2002 | 76° | 52° | 64° | 0.33" | — |
| 2001 | 77° | 54° | 65° | — | — |
| 2000 | 78° | 40° | 59° | — | — |
| 1999 | 66° | 51° | 59° | 0.25" | — |
| 1998 | 92° | 56° | 74° | — | — |
| 1997 | 80° | 57° | 69° | 0.18" | — |
| 1996 | 63° | 43° | 53° | — | — |
| 1995 | 80° | 57° | 69° | — | — |
| 1994 | 87° | 70° | 78° | — | — |
| 1993 | 93° | 61° | 77° | — | — |
| 1992 | 73° | 60° | 67° | — | — |
| 1991 | 76° | 64° | 70° | — | — |
| 1990warmest | 96° | 67° | 81° | — | — |
| 1989 | 54° | 37° | 45° | — | — |
| 1988 | 62° | 47° | 54° | 0.53" | — |
| 1987 | 70° | 45° | 57° | — | — |
| 1986 | 75° | 42° | 59° | — | — |
| 1985 | 61° | 50° | 55° | 1.73" | — |
| 1984 | 88° | 58° | 73° | 0.08" | — |
| 1983 | 62° | 44° | 53° | — | — |
| 1982 | 66° | 55° | 61° | 0.23" | — |
| 1981 | 89° | 46° | 68° | — | — |
| 1980 | 81° | 57° | 69° | — | — |
| 1979 | 67° | 51° | 59° | 4.01" | — |
| 1978 | 79° | 65° | 72° | — | — |
| 1977 | 67° | 53° | 60° | 2.82" | — |
| 1976 | 90° | 65° | 77° | — | — |
| 1975 | 64° | 35° | 50° | — | — |
| 1974coldest | 52° | 37° | 44° | 0.43" | — |
| 1973 | 63° | 49° | 56° | 0.15" | — |
| 1972 | 75° | 64° | 70° | 0.86" | — |
| 1971 | 78° | 50° | 64° | — | — |
55 years of data from SIOUX FALLS