Riverside May 18 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of May 18.
May 18 All-Time Records
1893–2024
Highest temperature 100 °F 1920
Lowest temperature 40 °F 1903
Lowest daily high 63 °F 1938
Highest daily low 64 °F 1997
Most precipitation 0.22 inches 2011
May 18 Average Weather
1991–2020 1
Average high 80.8 °F
Average low 55.0 °F
Chance precipitation 5.1%
Riverside May 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 79 56 0.00 n/a
2022 84 56 0.00 n/a
2021 79 58 0.00 n/a
2020 73 58 0.00 0.0
2019 75 49 0.00 n/a
2018 75 55 0.00 0.0
2017 83 48 0.00 0.0
2016 83 59 0.00 0.0
2015 73 57 0.00 0.0
2014 83 59 0.00 0.0
2013 80 60 0.00 0.0
2012 77 59 0.00 0.0
2011 66 52 0.22 n/a
2010 73 54 0.01 n/a
2009 92 60 0.00 n/a
2008 n/a n/a n/a n/a
2007 80 55 0.00 n/a
2006 81 60 0.00 n/a
2005 n/a n/a 0.00 n/a
2004 78 58 0.00 n/a
2003 79 54 0.00 n/a
2002 77 56 0.00 n/a
2001 78 58 0.00 n/a
2000 91 50 0.00 n/a
1999 86 52 0.00 n/a
1998 84 50 0.00 0.0
1997 83 64 0.00 0.0
1996 86 57 0.00 0.0
1995 78 53 0.00 0.0
1994 66 47 0.01 0.0
1993 85 58 0.00 0.0
1992 89 58 0.00 0.0
1991 73 47 0.00 0.0
1990 78 56 0.00 0.0
1989 78 58 0.00 0.0
1988 83 n/a 0.00 0.0
1987 80 60 0.00 0.0
1986 99 54 0.00 0.0
1985 82 45 0.00 0.0
1984 90 51 0.00 0.0
1983 97 51 0.00 0.0
1982 n/a 55 0.00 0.0
1981 84 50 0.00 0.0
1980 87 53 0.00 0.0
1979 81 54 0.00 0.0
1978 95 50 0.00 0.0
1977 77 45 0.00 0.0
1976 89 53 0.00 0.0
1975 79 52 0.00 0.0
1974 70 50 0.00 0.0
1973 84 55 0.00 0.0
1972 73 55 0.00 0.0
1971 87 55 0.00 0.0
1970 95 55 0.00 0.0
1969 85 57 0.00 0.0
1968 93 52 0.00 0.0
1967 85 53 0.00 0.0
1966 90 52 0.00 0.0
1965 84 56 0.00 0.0
1964 85 48 0.00 0.0
1963 77 56 0.00 0.0
1962 79 46 0.00 0.0
1961 74 52 0.00 0.0
1960 76 55 0.00 0.0
1959 74 56 0.00 0.0
1958 87 53 0.00 0.0
1957 74 56 0.00 0.0
1956 93 55 0.00 0.0
1955 92 49 0.00 0.0
1954 86 58 0.00 0.0
1953 82 43 0.00 0.0
1952 92 50 0.00 0.0
1951 87 49 0.00 0.0
1950 74 52 0.00 0.0
1949 67 52 0.02 0.0
1948 72 51 0.00 0.0
1947 89 56 0.00 0.0
1946 66 51 0.01 0.0
1945 75 42 0.00 0.0
1944 73 55 0.00 0.0
1943 90 43 0.00 0.0
1942 87 45 0.00 0.0
1941 75 55 0.00 0.0
1940 76 50 0.00 0.0
1939 79 49 0.00 0.0
1938 63 55 0.00 0.0
1937 86 58 0.00 0.0
1936 81 51 0.00 0.0
1935 67 42 0.00 0.0
1934 83 46 0.00 0.0
1933 74 42 0.00 0.0
1932 87 52 0.00 0.0
1931 81 53 0.00 0.0
1930 76 42 0.00 0.0
1929 84 54 0.00 0.0
1928 80 52 0.00 0.0
1927 82 50 0.00 n/a
1926 89 54 0.00 n/a
1925 90 47 n/a n/a
1924 90 58 n/a n/a
1923 80 52 0.00 n/a
1922 77 50 n/a n/a
1921 69 49 0.03 n/a
1920 100 52 n/a n/a
1919 n/a 54 0.01 n/a
1918 76 53 0.00 n/a
1917 68 53 0.10 n/a
1916 73 50 0.00 n/a
1915 71 50 0.00 n/a
1914 77 52 0.00 n/a
1913 75 55 0.00 n/a
1912 81 47 0.00 n/a
1911 78 45 0.00 n/a
1910 82 51 0.00 0.0
1909 72 42 0.00 n/a
1908 79 47 0.00 n/a
1907 85 48 0.00 n/a
1906 73 53 0.00 n/a
1905 90 47 0.00 n/a
1904 74 55 0.00 n/a
1903 74 40 0.00 n/a
1902 71 41 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 77 54 0.00 n/a
1894 74 44 n/a n/a
1893 81 42 0.00 n/a
What's the all-time high for Riverside on 5/18?
For the date of May 18, the highest temperature ever reached in Riverside history is 100 °F which happened in 1920.
Highest Temperatures in Riverside on May 18
Rank Temperature Year
1 100 °F 1920
2 99 °F 1986
3 97 °F 1983
4 95 °F 1970
4 95 °F 1978
6 93 °F 1956
6 93 °F 1968
8 92 °F 1952
8 92 °F 2009
8 92 °F 1955
What's the all-time low for Riverside on 5/18?
For the date of May 18, the lowest temperature ever reached in Riverside history is 40 °F which happened in 1903.
Lowest Temperatures in Riverside on May 18
Rank Temperature Year
1 40 °F 1903
2 41 °F 1902
3 42 °F 1930
3 42 °F 1909
3 42 °F 1893
3 42 °F 1935
3 42 °F 1933
3 42 °F 1945
9 43 °F 1943
9 43 °F 1953
Lowest High Temperatures in Riverside on May 18
Rank Temperature Year
1 63 °F 1938
2 66 °F 1994
2 66 °F 2011
2 66 °F 1946
5 67 °F 1949
5 67 °F 1935
7 68 °F 1917
8 69 °F 1921
9 70 °F 1974
10 71 °F 1915
10 71 °F 1902
What's the most it has ever rained in Riverside on 5/18?
For the date of May 18, the most precipitation ever recorded in Riverside history is 0.22 inches which happened in 2011.
All-Time Most Precipitation in Riverside on May 18
Rank Precipitation Year
1 0.22 inches 2011
2 0.10 inches 1917
3 0.03 inches 1921
4 0.02 inches 1949
5 0.01 inches 1946
5 0.01 inches 1994
5 0.01 inches 1919
5 0.01 inches 2010
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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