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Rapid City August 20 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of August 20.
August 20 All-Time Records
1948–2022
Highest temperature 104 °F 1973
Lowest temperature 42 °F 2016
Lowest daily high 62 °F 1966
Highest daily low 66 °F 1991
Most precipitation 0.5 inches 1965
Most snow none -
August 20 Average Weather
1991–2020 1
Average high 85.8 °F
Average low 55.8 °F
Chance precipitation 24.8%
Chance snow 0%
Rapid City August 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 85 50 0.00 n/a
2021 73 51 0.19 n/a
2020 97 60 0.00 n/a
2019 81 63 0.00 n/a
2018 68 43 0.02 0.0
2017 82 56 0.00 0.0
2016 73 42 0.00 0.0
2015 83 45 0.00 0.0
2014 89 63 0.00 0.0
2013 95 59 0.00 0.0
2012 86 48 0.00 0.0
2011 83 53 0.00 0.0
2010 93 55 0.00 0.0
2009 73 48 0.00 0.0
2008 94 62 0.00 0.0
2007 83 57 0.00 0.0
2006 91 59 0.01 0.0
2005 87 53 0.00 n/a
2004 78 53 0.00 n/a
2003 97 60 0.00 n/a
2002 88 64 0.00 n/a
2001 92 57 0.00 0.0
2000 94 59 0.00 0.0
1999 91 57 0.00 0.0
1998 87 63 0.21 n/a
1997 80 52 0.00 0.0
1996 96 56 0.00 n/a
1995 92 49 0.00 0.0
1994 85 52 0.00 0.0
1993 77 61 0.23 0.0
1992 97 57 0.00 0.0
1991 95 66 0.00 0.0
1990 84 56 0.00 0.0
1989 84 52 0.00 0.0
1988 97 60 0.00 0.0
1987 87 57 0.00 0.0
1986 74 50 0.00 0.0
1985 81 56 0.00 0.0
1984 77 55 0.21 0.0
1983 94 59 0.04 0.0
1982 81 62 0.00 0.0
1981 95 62 0.00 0.0
1980 73 54 0.21 0.0
1979 71 54 0.00 0.0
1978 92 47 0.00 0.0
1977 86 54 0.03 0.0
1976 100 61 0.00 0.0
1975 86 57 0.00 0.0
1974 79 56 0.00 0.0
1973 104 60 0.00 0.0
1972 88 60 0.00 0.0
1971 93 56 0.00 0.0
1970 89 51 0.00 0.0
1969 94 57 0.00 0.0
1968 88 54 0.00 0.0
1967 91 53 0.00 0.0
1966 62 51 0.18 0.0
1965 65 57 0.53 0.0
1964 72 42 0.00 0.0
1963 98 64 0.01 0.0
1962 92 58 0.00 0.0
1961 95 64 0.00 0.0
1960 95 54 0.00 0.0
1959 88 59 0.00 0.0
1958 78 55 0.06 0.0
1957 87 61 0.00 0.0
1956 72 51 0.00 0.0
1955 97 62 0.00 0.0
1954 91 55 0.12 0.0
1953 92 60 0.00 0.0
1952 85 62 0.01 0.0
1951 72 52 0.00 0.0
1950 76 45 0.00 0.0
1949 85 57 0.11 0.0
1948 80 58 0.00 0.0
All-Time Highest Temperatures in Rapid City on August 20
Rank Temperature Year
1 104 °F 1973
2 100 °F 1976
3 98 °F 1963
4 97 °F 1988
4 97 °F 1955
4 97 °F 1992
4 97 °F 2003
4 97 °F 2020
9 96 °F 1996
10 95 °F 1961
10 95 °F 1960
10 95 °F 1981
10 95 °F 1991
10 95 °F 2013
All-Time Lowest Temperatures in Rapid City on August 20
Rank Temperature Year
1 42 °F 1964
1 42 °F 2016
3 43 °F 2018
4 45 °F 2015
4 45 °F 1950
6 47 °F 1978
7 48 °F 2009
7 48 °F 2012
9 49 °F 1995
10 50 °F 2022
10 50 °F 1986
Lowest High Temperatures in Rapid City on August 20
Rank Temperature Year
1 62 °F 1966
2 65 °F 1965
3 68 °F 2018
4 71 °F 1979
5 72 °F 1964
5 72 °F 1956
5 72 °F 1951
8 73 °F 2021
8 73 °F 2016
8 73 °F 2009
8 73 °F 1980
All-Time Most Precipitation in Rapid City on August 20
Rank Precipitation Year
1 0.5 inches 1965
2 0.2 inches 1993
3 0.2 inches 1980
3 0.2 inches 1998
3 0.2 inches 1984
6 0.2 inches 2021
7 0.2 inches 1966
8 0.1 inches 1954
9 0.1 inches 1949
10 0.1 inches 1958
Weather Station Details
Years Station Coordinates
1948–2022 Rapid City Regional Airport location