Weather on May 18
Sioux Falls, SD
55 Years of Data
Avg High
72°F
Avg Low
48°F
Warmest
2012
79°F avg
Coldest
2015
40°F avg
About This Date
May 18th in Sioux Falls, SD typically brings pleasant spring weather, with average highs around 72°F and lows near 48°F. Over 55 years of records, the warmest May 18th was in 2012 (79°F average), while the coldest was 2015 (40°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 29% of May 18th dates historically, with the wettest May 18th recording 3.1" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 18th in Sioux Falls, SD? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 35° | 52° | — | — |
| 2024 | 75° | 48° | 62° | — | — |
| 2023 | 75° | 51° | 63° | 0.08" | — |
| 2022 | 84° | 46° | 65° | — | — |
| 2021 | 68° | 59° | 64° | — | — |
| 2020 | 66° | 45° | 55° | — | — |
| 2019 | 71° | 48° | 60° | 0.86" | — |
| 2018 | 76° | 55° | 65° | — | — |
| 2017 | 55° | 49° | 52° | — | — |
| 2016 | 70° | 37° | 53° | — | — |
| 2015coldest | 45° | 36° | 40° | — | — |
| 2014 | 71° | 45° | 58° | — | — |
| 2013 | 81° | 65° | 73° | — | — |
| 2012warmest | 91° | 67° | 79° | — | — |
| 2011 | 69° | 36° | 52° | — | — |
| 2010 | 78° | 40° | 59° | — | — |
| 2009 | 87° | 45° | 66° | — | — |
| 2008 | 72° | 42° | 57° | — | — |
| 2007 | 81° | 54° | 67° | — | — |
| 2006 | 75° | 43° | 59° | — | — |
| 2005 | 70° | 49° | 59° | 2.24" | — |
| 2004 | 71° | 40° | 55° | — | — |
| 2003 | 78° | 55° | 67° | — | — |
| 2002 | 59° | 30° | 45° | — | — |
| 2001 | 78° | 46° | 62° | — | — |
| 2000 | 59° | 39° | 49° | 2.24" | — |
| 1999 | 72° | 37° | 54° | — | — |
| 1998 | 88° | 62° | 75° | — | — |
| 1997 | 75° | 44° | 60° | 0.25" | — |
| 1996 | 90° | 56° | 73° | 3.1" | — |
| 1995 | 71° | 41° | 56° | — | — |
| 1994 | 87° | 62° | 75° | — | — |
| 1993 | 58° | 44° | 51° | — | — |
| 1992 | 73° | 49° | 61° | — | — |
| 1991 | 51° | 45° | 48° | — | — |
| 1990 | 73° | 41° | 57° | 0.69" | — |
| 1989 | 64° | 58° | 61° | 1.12" | — |
| 1988 | 78° | 61° | 69° | 0.28" | — |
| 1987 | 63° | 52° | 57° | 0.03" | — |
| 1986 | 66° | 34° | 50° | — | — |
| 1985 | 79° | 49° | 64° | — | — |
| 1984 | 76° | 50° | 63° | — | — |
| 1983 | 54° | 47° | 50° | 0.3" | — |
| 1982 | 74° | 50° | 62° | — | — |
| 1981 | 70° | 44° | 57° | — | — |
| 1980 | 67° | 46° | 56° | 0.05" | — |
| 1979 | 62° | 48° | 55° | 0.43" | — |
| 1978 | 77° | 47° | 62° | 0.28" | — |
| 1977 | 87° | 69° | 78° | — | — |
| 1976 | 75° | 33° | 54° | — | — |
| 1975 | 85° | 55° | 70° | — | — |
| 1974 | 56° | 51° | 53° | 0.69" | — |
| 1973 | 80° | 50° | 65° | — | — |
| 1972 | 83° | 63° | 73° | — | — |
| 1971 | 56° | 46° | 51° | 0.03" | — |
55 years of data from SIOUX FALLS