Weather on October 18
Sioux Falls, SD
55 Years of Data
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.
| 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" | — |
Sioux Falls, SD Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Sioux Falls, SD Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Sioux Falls, SD Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Sioux Falls, SD
Sioux Falls, SD has no months that meet our "pleasant" threshold — every season has tradeoffs.