Riverside August 18 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of August 18.
August 18 All-Time Records
1893–2024
Highest temperature 108 °F 2020
Lowest temperature 47 °F 1924
Lowest daily high 77 °F 1983
Highest daily low 75 °F 2012
Most precipitation 0.62 inches 1945
August 18 Average Weather
1991–2020 1
Average high 95.6 °F
Average low 64.2 °F
Chance precipitation 0.8%
Riverside August 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 98 64 0.00 n/a
2022 97 67 0.00 n/a
2021 80 68 0.00 n/a
2020 108 74 0.00 0.0
2019 90 60 0.00 0.0
2018 95 68 0.00 0.0
2017 89 64 0.00 0.0
2016 101 66 0.00 0.0
2015 92 67 0.00 0.0
2014 99 67 0.00 0.0
2013 96 66 0.00 0.0
2012 99 75 0.00 0.0
2011 96 64 0.00 n/a
2010 100 73 0.00 n/a
2009 90 59 0.00 n/a
2008 91 64 0.00 n/a
2007 n/a n/a n/a n/a
2006 92 58 0.00 n/a
2005 88 58 0.00 n/a
2004 90 61 0.00 n/a
2003 98 66 0.00 n/a
2002 83 63 0.00 n/a
2001 100 65 0.00 n/a
2000 96 64 0.00 n/a
1999 95 62 0.00 n/a
1998 89 63 0.00 0.0
1997 98 61 0.00 0.0
1996 96 63 0.00 0.0
1995 95 60 0.00 0.0
1994 96 70 0.00 0.0
1993 93 62 0.00 0.0
1992 105 71 0.00 0.0
1991 92 63 0.00 0.0
1990 88 62 0.00 0.0
1989 86 59 0.00 0.0
1988 92 60 0.00 0.0
1987 87 59 n/a 0.0
1986 103 69 0.00 0.0
1985 88 58 0.00 0.0
1984 87 71 0.00 0.0
1983 77 70 0.17 0.0
1982 98 63 0.00 0.0
1981 89 66 0.00 0.0
1980 87 63 0.00 0.0
1979 86 66 0.00 0.0
1978 92 55 0.00 0.0
1977 85 68 0.00 0.0
1976 83 56 0.00 0.0
1975 86 55 0.00 0.0
1974 93 57 0.00 0.0
1973 101 65 0.00 0.0
1972 83 59 0.00 0.0
1971 94 64 0.00 0.0
1970 93 65 0.00 0.0
1969 91 63 0.00 0.0
1968 83 56 0.00 0.0
1967 101 69 0.00 0.0
1966 99 66 0.00 0.0
1965 87 63 0.00 0.0
1964 95 66 0.00 0.0
1963 94 62 0.00 0.0
1962 97 61 0.00 0.0
1961 98 64 0.00 0.0
1960 101 61 0.00 0.0
1959 87 57 0.00 0.0
1958 89 65 0.00 0.0
1957 98 64 0.00 0.0
1956 89 60 0.00 0.0
1955 97 63 0.00 0.0
1954 93 53 0.00 0.0
1953 101 52 0.00 0.0
1952 96 57 0.00 0.0
1951 96 59 0.00 0.0
1950 108 54 0.00 0.0
1949 94 50 0.00 0.0
1948 96 49 0.00 0.0
1947 92 57 0.00 0.0
1946 100 54 0.00 0.0
1945 82 71 0.62 0.0
1944 94 54 0.00 0.0
1943 95 56 0.00 0.0
1942 101 64 0.00 0.0
1941 99 57 0.00 0.0
1940 95 55 0.00 0.0
1939 99 61 0.00 0.0
1938 80 60 0.00 0.0
1937 93 60 0.00 0.0
1936 96 60 0.00 0.0
1935 89 54 0.00 0.0
1934 99 61 0.00 0.0
1933 99 63 0.00 0.0
1932 103 55 0.00 0.0
1931 96 61 0.00 0.0
1930 88 55 0.00 0.0
1929 98 62 0.00 0.0
1928 95 57 0.00 0.0
1927 97 61 0.00 n/a
1926 92 55 n/a n/a
1925 99 50 n/a n/a
1924 91 47 n/a n/a
1923 89 65 n/a n/a
1922 94 58 n/a n/a
1921 100 51 n/a 0.0
1920 93 58 n/a 0.0
1919 96 59 n/a n/a
1918 90 47 n/a n/a
1917 95 47 n/a n/a
1916 84 50 n/a n/a
1915 107 48 n/a n/a
1914 89 62 0.00 n/a
1913 95 48 0.00 n/a
1912 84 58 0.00 0.0
1911 105 58 0.00 n/a
1910 98 52 0.00 n/a
1909 88 62 n/a n/a
1908 102 60 0.00 n/a
1907 93 56 n/a n/a
1906 86 64 0.00 n/a
1905 90 51 0.00 n/a
1904 92 57 0.00 n/a
1903 105 64 0.00 n/a
1902 84 57 0.00 n/a
1901 n/a n/a n/a n/a
1900 n/a n/a n/a n/a
1899 n/a n/a n/a n/a
1898 n/a n/a n/a n/a
1897 n/a n/a n/a n/a
1896 n/a n/a n/a n/a
1895 99 57 n/a n/a
1894 94 54 n/a n/a
1893 n/a n/a n/a n/a
What's the all-time high for Riverside on 8/18?
For the date of Aug 18, the highest temperature ever reached in Riverside history is 108 °F which has happened 2 times, most recently in 2020.
Highest Temperatures in Riverside on August 18
Rank Temperature Year
1 108 °F 2020
1 108 °F 1950
3 107 °F 1915
4 105 °F 1911
4 105 °F 1992
4 105 °F 1903
7 103 °F 1986
7 103 °F 1932
9 102 °F 1908
10 101 °F 1973
10 101 °F 2016
10 101 °F 1960
10 101 °F 1967
10 101 °F 1953
10 101 °F 1942
What's the all-time low for Riverside on 8/18?
For the date of Aug 18, the lowest temperature ever reached in Riverside history is 47 °F which has happened 3 times, most recently in 1924.
Lowest Temperatures in Riverside on August 18
Rank Temperature Year
1 47 °F 1924
1 47 °F 1917
1 47 °F 1918
4 48 °F 1915
4 48 °F 1913
6 49 °F 1948
7 50 °F 1925
7 50 °F 1916
7 50 °F 1949
10 51 °F 1905
10 51 °F 1921
Lowest High Temperatures in Riverside on August 18
Rank Temperature Year
1 77 °F 1983
2 80 °F 1938
2 80 °F 2021
4 82 °F 1945
5 83 °F 2002
5 83 °F 1972
5 83 °F 1976
5 83 °F 1968
9 84 °F 1912
9 84 °F 1902
9 84 °F 1916
What's the most it has ever rained in Riverside on 8/18?
For the date of Aug 18, the most precipitation ever recorded in Riverside history is 0.62 inches which happened in 1945.
All-Time Most Precipitation in Riverside on August 18
Rank Precipitation Year
1 0.62 inches 1945
2 0.17 inches 1983
Weather Station Details
Years Station Coordinates
1999–2024 Riverside Municipal Airport location
1893–1998 Riverside Fire Station location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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