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Rapid City August 18 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of August 18.
August 18 All-Time Records
1948–2022
Highest temperature 104 °F 1959
Lowest temperature 43 °F 2002
Lowest daily high 58 °F 1956
Highest daily low 70 °F 1958
Most precipitation 0.6 inches 1996
Most snow none -
August 18 Average Weather
1991–2020 1
Average high 85.8 °F
Average low 56.1 °F
Chance precipitation 25.7%
Chance snow 0%
Rapid City August 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 90 63 0.00 n/a
2021 85 62 0.00 n/a
2020 95 59 0.00 n/a
2019 78 49 0.00 n/a
2018 86 55 0.00 0.0
2017 86 58 0.00 0.0
2016 76 60 0.00 0.0
2015 61 50 0.19 0.0
2014 82 56 0.00 0.0
2013 84 60 0.01 0.0
2012 81 53 0.00 0.0
2011 94 58 0.00 0.0
2010 94 53 0.00 0.0
2009 86 46 0.00 0.0
2008 87 52 0.00 0.0
2007 84 63 0.16 0.0
2006 73 53 0.00 0.0
2005 79 58 0.08 n/a
2004 76 45 0.00 n/a
2003 88 63 0.00 n/a
2002 79 43 0.00 n/a
2001 83 50 0.00 0.0
2000 86 48 0.00 0.0
1999 83 50 0.00 0.0
1998 95 65 0.07 n/a
1997 80 52 0.11 0.0
1996 92 62 0.62 n/a
1995 74 49 0.00 0.0
1994 94 64 0.00 0.0
1993 80 57 0.00 0.0
1992 88 54 0.00 0.0
1991 86 59 0.00 0.0
1990 86 61 0.00 0.0
1989 92 60 0.24 0.0
1988 88 54 0.00 0.0
1987 78 46 0.00 0.0
1986 92 62 0.00 0.0
1985 79 45 0.00 0.0
1984 84 61 0.00 0.0
1983 100 66 0.33 0.0
1982 86 66 0.04 0.0
1981 84 58 0.00 0.0
1980 95 58 0.00 0.0
1979 77 62 0.01 0.0
1978 63 46 0.02 0.0
1977 85 56 0.00 0.0
1976 96 68 0.00 0.0
1975 77 56 0.05 0.0
1974 90 59 0.00 0.0
1973 97 64 0.00 0.0
1972 87 60 0.23 0.0
1971 82 60 0.15 0.0
1970 92 63 0.00 0.0
1969 83 55 0.00 0.0
1968 74 51 0.00 0.0
1967 72 52 0.01 0.0
1966 79 50 0.40 0.0
1965 81 58 0.00 0.0
1964 100 59 0.00 0.0
1963 85 57 0.00 0.0
1962 92 63 0.00 0.0
1961 88 61 0.00 0.0
1960 80 57 0.00 0.0
1959 104 61 0.00 0.0
1958 95 70 0.00 0.0
1957 83 54 0.00 0.0
1956 58 53 0.16 0.0
1955 99 68 0.00 0.0
1954 83 54 0.00 0.0
1953 88 61 0.00 0.0
1952 95 62 0.00 0.0
1951 84 56 0.00 0.0
1950 77 52 0.00 0.0
1949 77 58 0.38 0.0
1948 95 62 0.00 0.0
All-Time Highest Temperatures in Rapid City on August 18
Rank Temperature Year
1 104 °F 1959
2 100 °F 1983
2 100 °F 1964
4 99 °F 1955
5 97 °F 1973
6 96 °F 1976
7 95 °F 1998
7 95 °F 1952
7 95 °F 2020
7 95 °F 1958
7 95 °F 1948
7 95 °F 1980
All-Time Lowest Temperatures in Rapid City on August 18
Rank Temperature Year
1 43 °F 2002
2 45 °F 1985
2 45 °F 2004
4 46 °F 1978
4 46 °F 2009
4 46 °F 1987
7 48 °F 2000
8 49 °F 2019
8 49 °F 1995
10 50 °F 1999
10 50 °F 2015
10 50 °F 1966
10 50 °F 2001
Lowest High Temperatures in Rapid City on August 18
Rank Temperature Year
1 58 °F 1956
2 61 °F 2015
3 63 °F 1978
4 72 °F 1967
5 73 °F 2006
6 74 °F 1968
6 74 °F 1995
8 76 °F 2016
8 76 °F 2004
10 77 °F 1979
10 77 °F 1949
10 77 °F 1950
10 77 °F 1975
All-Time Most Precipitation in Rapid City on August 18
Rank Precipitation Year
1 0.6 inches 1996
2 0.4 inches 1966
3 0.4 inches 1949
4 0.3 inches 1983
5 0.2 inches 1989
6 0.2 inches 1972
7 0.2 inches 2015
8 0.2 inches 1956
8 0.2 inches 2007
10 0.1 inches 1971
Weather Station Details
Years Station Coordinates
1948–2022 Rapid City Regional Airport location