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Rapid City May 21 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of May 21.
May 21 All-Time Records
1948–2022
Highest temperature 92 °F 1966
Lowest temperature 28 °F 2022
Lowest daily high 40 °F 2019
Highest daily low 62 °F 1954
Most precipitation 2.8 inches 1999
Most snow none -
May 21 Average Weather
1991–2020 1
Average high 68.6 °F
Average low 43.8 °F
Chance precipitation 43.7%
Chance snow 0.8%
Rapid City May 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 48 28 0.02 n/a
2021 56 40 0.07 n/a
2020 76 46 0.01 n/a
2019 40 32 2.34 n/a
2018 74 38 0.00 0.0
2017 68 34 0.01 0.0
2016 67 52 0.01 0.0
2015 63 30 0.00 0.0
2014 63 47 0.08 0.0
2013 52 42 0.08 0.0
2012 86 47 0.00 0.0
2011 60 47 0.33 0.0
2010 66 49 0.30 0.0
2009 62 45 0.01 0.0
2008 67 45 0.00 0.0
2007 87 53 0.02 0.0
2006 75 46 0.00 0.0
2005 75 56 0.00 n/a
2004 75 48 0.69 n/a
2003 72 37 0.00 n/a
2002 80 50 0.03 n/a
2001 61 38 0.00 n/a
2000 75 43 0.00 0.0
1999 77 43 2.80 0.0
1998 62 47 0.90 n/a
1997 77 47 0.02 0.0
1996 73 37 0.00 n/a
1995 74 45 0.00 0.0
1994 76 47 0.00 0.0
1993 77 45 0.18 0.0
1992 75 45 0.67 0.0
1991 80 58 0.00 0.0
1990 72 47 0.00 0.0
1989 77 41 0.00 0.0
1988 70 45 0.00 0.0
1987 52 39 0.00 0.0
1986 79 50 0.00 0.0
1985 84 52 0.00 0.0
1984 59 47 0.23 0.0
1983 74 41 0.00 0.0
1982 59 47 0.00 0.0
1981 71 48 0.00 0.0
1980 86 53 0.00 0.0
1979 79 43 0.00 0.0
1978 76 44 0.10 0.0
1977 53 45 0.50 0.0
1976 60 50 0.12 0.0
1975 54 43 0.01 0.0
1974 67 33 0.00 0.0
1973 66 42 0.00 0.0
1972 83 53 0.44 0.0
1971 72 41 0.00 0.0
1970 67 51 0.00 0.0
1969 46 33 0.40 0.0
1968 70 34 0.00 0.0
1967 75 47 0.00 0.0
1966 92 45 0.00 0.0
1965 56 47 0.00 0.0
1964 91 58 0.00 0.0
1963 54 29 0.00 0.0
1962 57 47 1.86 0.0
1961 66 52 0.00 0.0
1960 84 41 0.00 0.0
1959 52 37 0.00 0.0
1958 88 54 0.08 0.0
1957 52 41 0.08 0.0
1956 84 54 0.00 0.0
1955 88 53 0.02 0.0
1954 92 62 0.00 0.0
1953 60 39 0.42 0.0
1952 68 49 0.48 0.0
1951 63 43 0.00 0.0
1950 79 44 0.00 0.0
1949 66 46 0.26 0.0
1948 77 56 0.00 0.0
All-Time Highest Temperatures in Rapid City on May 21
Rank Temperature Year
1 92 °F 1966
1 92 °F 1954
3 91 °F 1964
4 88 °F 1955
4 88 °F 1958
6 87 °F 2007
7 86 °F 2012
7 86 °F 1980
9 84 °F 1956
9 84 °F 1985
9 84 °F 1960
All-Time Lowest Temperatures in Rapid City on May 21
Rank Temperature Year
1 28 °F 2022
2 29 °F 1963
3 30 °F 2015
4 32 °F 2019
5 33 °F 1974
5 33 °F 1969
7 34 °F 2017
7 34 °F 1968
9 37 °F 2003
9 37 °F 1959
9 37 °F 1996
Lowest High Temperatures in Rapid City on May 21
Rank Temperature Year
1 40 °F 2019
2 46 °F 1969
3 48 °F 2022
4 52 °F 1959
4 52 °F 1987
4 52 °F 2013
4 52 °F 1957
8 53 °F 1977
9 54 °F 1963
9 54 °F 1975
All-Time Most Precipitation in Rapid City on May 21
Rank Precipitation Year
1 2.8 inches 1999
2 2.3 inches 2019
3 1.9 inches 1962
4 0.9 inches 1998
5 0.7 inches 2004
6 0.7 inches 1992
7 0.5 inches 1977
8 0.5 inches 1952
9 0.4 inches 1972
10 0.4 inches 1953
Weather Station Details
Years Station Coordinates
1948–2022 Rapid City Regional Airport location