Weather on October 18
Sioux Falls, SD
55 Years of Data
Avg High
59°F
Avg Low
36°F
Warmest
2024
65°F avg
Coldest
1972
24°F avg
About This Date
October 18th in Sioux Falls, SD typically brings cool fall weather, with average highs around 59°F and lows near 36°F. Over 55 years of records, the warmest October 18th was in 2024 (65°F average), while the coldest was 1972 (24°F) — a 41°F range across recorded history. Precipitation has occurred on 27% of recorded October 18th dates, with snow falling 9% of the time (heaviest snowfall: 1.4"). The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Sioux Falls, SD? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 42° | 51° | 0.1" | — |
| 2024warmest | 75° | 55° | 65° | 0.03" | — |
| 2023 | 61° | 51° | 56° | 0.03" | — |
| 2022 | 44° | 17° | 31° | — | — |
| 2021 | 76° | 42° | 59° | — | — |
| 2020 | 41° | 28° | 35° | — | — |
| 2019 | 72° | 50° | 61° | — | — |
| 2018 | 71° | 35° | 53° | — | — |
| 2017 | 74° | 41° | 57° | — | — |
| 2016 | 67° | 41° | 54° | — | — |
| 2015 | 68° | 42° | 55° | — | — |
| 2014 | 53° | 42° | 48° | — | — |
| 2013 | 52° | 29° | 41° | — | — |
| 2012 | 45° | 40° | 42° | 1.47" | — |
| 2011 | 51° | 31° | 41° | — | — |
| 2010 | 58° | 33° | 45° | — | — |
| 2009 | 64° | 39° | 52° | — | — |
| 2008 | 59° | 39° | 49° | — | — |
| 2007 | 57° | 51° | 54° | 1.17" | — |
| 2006 | 39° | 29° | 34° | 0.33" | 1.4" |
| 2005 | 81° | 42° | 61° | — | — |
| 2004 | 58° | 40° | 49° | — | — |
| 2003 | 84° | 40° | 62° | — | — |
| 2002 | 53° | 36° | 44° | — | — |
| 2001 | 58° | 39° | 48° | — | — |
| 2000 | 78° | 35° | 57° | — | — |
| 1999 | 55° | 35° | 45° | 0.05" | — |
| 1998 | 60° | 35° | 48° | — | — |
| 1997 | 68° | 45° | 56° | — | — |
| 1996 | 50° | 32° | 41° | — | — |
| 1995 | 66° | 36° | 51° | — | — |
| 1994 | 65° | 47° | 56° | — | — |
| 1993 | 61° | 40° | 50° | — | — |
| 1992 | 46° | 19° | 33° | — | — |
| 1991 | 46° | 25° | 35° | 0.25" | 0.9" |
| 1990 | 44° | 24° | 34° | — | — |
| 1989 | 48° | 19° | 34° | — | — |
| 1988 | 58° | 31° | 44° | — | — |
| 1987 | 49° | 30° | 39° | — | — |
| 1986 | 63° | 42° | 52° | — | — |
| 1985 | 63° | 37° | 50° | — | — |
| 1984 | 52° | 37° | 44° | 4.01" | — |
| 1983 | 58° | 46° | 52° | 0.25" | — |
| 1982 | 63° | 42° | 52° | — | — |
| 1981 | 48° | 31° | 39° | — | — |
| 1980 | 41° | 29° | 35° | 0.05" | 0.1" |
| 1979 | 66° | 45° | 55° | 1.19" | — |
| 1978 | 55° | 33° | 44° | — | — |
| 1977 | 60° | 34° | 47° | — | — |
| 1976 | 38° | 32° | 35° | 0.38" | 1.4" |
| 1975 | 65° | 30° | 47° | — | — |
| 1974 | 64° | 37° | 51° | — | — |
| 1973 | 70° | 33° | 51° | — | — |
| 1972coldest | 33° | 15° | 24° | 0.05" | 0.2" |
| 1971 | 77° | 52° | 64° | 0.48" | — |
55 years of data from SIOUX FALLS