Weather on October 20
Sioux Falls, SD
55 Years of Data
Avg High
61°F
Avg Low
35°F
Warmest
2017
66°F avg
Coldest
1982
32°F avg
About This Date
October 20th in Sioux Falls, SD typically brings mild fall weather, with average highs around 61°F and lows near 35°F — a 26°F daily swing. Over 55 years of records, the warmest October 20th was in 2017 (66°F average), while the coldest was 1982 (32°F) — a 34°F range across recorded history. Precipitation has occurred on 18% of recorded October 20th dates, with snow falling 4% of the time. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Sioux Falls, SD? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 48° | 55° | — | — |
| 2024 | 84° | 48° | 66° | — | — |
| 2023 | 79° | 42° | 60° | — | — |
| 2022 | 71° | 34° | 52° | — | — |
| 2021 | 53° | 38° | 45° | 1.45" | — |
| 2020 | 46° | 34° | 40° | 0.66" | 0.1" |
| 2019 | 60° | 36° | 48° | 0.1" | — |
| 2018 | 47° | 30° | 39° | — | — |
| 2017warmest | 77° | 56° | 66° | — | — |
| 2016 | 51° | 32° | 42° | — | — |
| 2015 | 75° | 46° | 61° | — | — |
| 2014 | 70° | 35° | 52° | — | — |
| 2013 | 54° | 34° | 44° | 0.03" | — |
| 2012 | 61° | 31° | 46° | — | — |
| 2011 | 53° | 24° | 39° | — | — |
| 2010 | 70° | 37° | 53° | — | — |
| 2009 | 56° | 45° | 50° | 0.03" | — |
| 2008 | 60° | 36° | 48° | — | — |
| 2007 | 73° | 38° | 55° | — | — |
| 2006 | 54° | 32° | 43° | — | — |
| 2005 | 60° | 30° | 45° | — | — |
| 2004 | 53° | 46° | 50° | — | — |
| 2003 | 78° | 37° | 58° | — | — |
| 2002 | 60° | 31° | 45° | — | — |
| 2001 | 65° | 37° | 51° | — | — |
| 2000 | 70° | 41° | 55° | — | — |
| 1999 | 65° | 24° | 44° | — | — |
| 1998 | 58° | 30° | 44° | — | — |
| 1997 | 52° | 26° | 39° | — | — |
| 1996 | 61° | 41° | 51° | — | — |
| 1995 | 46° | 36° | 41° | — | — |
| 1994 | 73° | 36° | 54° | — | — |
| 1993 | 52° | 30° | 41° | 0.1" | — |
| 1992 | 63° | 32° | 47° | — | — |
| 1991 | 62° | 27° | 44° | — | — |
| 1990 | 47° | 38° | 42° | 0.74" | — |
| 1989 | 63° | 16° | 39° | — | — |
| 1988 | 57° | 40° | 48° | — | — |
| 1987 | 39° | 26° | 33° | 0.03" | 0.1" |
| 1986 | 74° | 41° | 57° | — | — |
| 1985 | 63° | 32° | 47° | — | — |
| 1984 | 50° | 30° | 40° | — | — |
| 1983 | 49° | 43° | 46° | 0.05" | — |
| 1982coldest | 39° | 25° | 32° | — | — |
| 1981 | 53° | 42° | 48° | — | — |
| 1980 | 66° | 38° | 52° | — | — |
| 1979 | 65° | 44° | 54° | — | — |
| 1978 | 78° | 33° | 56° | — | — |
| 1977 | 74° | 43° | 58° | — | — |
| 1976 | 46° | 28° | 37° | — | — |
| 1975 | 72° | 33° | 52° | — | — |
| 1974 | 59° | 33° | 46° | — | — |
| 1973 | 71° | 34° | 52° | — | — |
| 1972 | 41° | 33° | 37° | 0.48" | — |
| 1971 | 60° | 30° | 45° | — | — |
55 years of data from SIOUX FALLS