Riverside December 18 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of December 18.
December 18 All-Time Records
1893–2024
Highest temperature 89 °F 1917
Lowest temperature 29 °F 1924
Lowest daily high 50 °F 1967
Highest daily low 56 °F 2000
Most precipitation 1.42 inches 1921
December 18 Average Weather
1991–2020 1
Average high 67.5 °F
Average low 42.2 °F
Chance precipitation 16.7%
Riverside December 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 73 53 0.00 n/a
2022 64 37 0.00 n/a
2021 70 42 0.00 n/a
2020 69 41 0.00 n/a
2019 62 36 0.00 0.0
2018 66 48 0.00 0.0
2017 71 44 0.00 n/a
2016 61 36 0.00 0.0
2015 74 40 0.00 0.0
2014 62 45 0.00 0.0
2013 72 53 0.00 0.0
2012 59 44 0.05 n/a
2011 59 42 0.00 n/a
2010 61 54 0.22 n/a
2009 80 47 0.00 n/a
2008 55 37 0.02 n/a
2007 n/a n/a n/a n/a
2006 55 31 0.01 n/a
2005 62 45 0.00 n/a
2004 79 40 0.00 n/a
2003 81 44 0.00 n/a
2002 58 36 0.00 n/a
2001 72 30 0.00 n/a
2000 72 56 0.00 n/a
1999 76 40 0.00 n/a
1998 n/a n/a 0.00 0.0
1997 63 40 0.10 0.0
1996 70 42 0.00 0.0
1995 70 35 0.00 0.0
1994 82 36 0.00 0.0
1993 n/a n/a n/a 0.0
1992 60 43 0.08 0.0
1991 61 53 0.00 0.0
1990 64 34 0.00 0.0
1989 63 39 0.00 0.0
1988 55 41 0.24 0.0
1987 67 42 0.00 0.0
1986 68 37 0.00 0.0
1985 80 43 0.00 0.0
1984 53 36 0.50 0.0
1983 67 45 0.00 0.0
1982 71 33 0.00 0.0
1981 75 42 0.00 0.0
1980 70 40 0.00 0.0
1979 78 40 0.00 0.0
1978 54 42 0.62 0.0
1977 62 52 0.00 0.0
1976 67 37 0.00 0.0
1975 71 32 0.00 0.0
1974 75 37 0.00 0.0
1973 71 38 0.00 0.0
1972 77 44 0.00 0.0
1971 66 43 0.00 0.0
1970 53 38 0.00 0.0
1969 60 46 0.00 0.0
1968 62 32 0.00 0.0
1967 50 42 0.51 0.0
1966 79 42 0.00 0.0
1965 58 33 0.00 0.0
1964 56 36 0.02 0.0
1963 69 36 0.00 0.0
1962 65 54 0.00 0.0
1961 58 49 0.00 0.0
1960 79 35 0.00 0.0
1959 77 36 0.00 0.0
1958 80 34 0.00 0.0
1957 59 43 0.00 0.0
1956 74 33 0.00 0.0
1955 56 38 0.00 0.0
1954 74 37 0.00 0.0
1953 71 32 0.00 0.0
1952 58 38 0.01 0.0
1951 59 32 0.00 0.0
1950 80 35 0.00 0.0
1949 56 46 0.16 0.0
1948 62 30 0.03 0.0
1947 70 36 0.00 0.0
1946 71 38 0.00 0.0
1945 63 43 0.00 0.0
1944 79 34 0.00 0.0
1943 65 51 0.13 0.0
1942 64 48 0.05 0.0
1941 73 36 0.00 0.0
1940 58 44 0.30 0.0
1939 85 40 0.00 0.0
1938 71 50 0.67 0.0
1937 76 40 0.00 0.0
1936 72 44 0.00 0.0
1935 70 39 0.00 0.0
1934 68 47 0.00 0.0
1933 58 37 0.00 n/a
1932 65 31 0.00 0.0
1931 72 35 0.00 n/a
1930 n/a n/a n/a n/a
1929 81 50 0.00 0.0
1928 56 37 0.00 n/a
1927 57 32 0.00 n/a
1926 57 36 0.03 n/a
1925 60 39 0.12 n/a
1924 54 29 n/a n/a
1923 72 36 0.04 n/a
1922 74 41 n/a n/a
1921 56 48 1.42 n/a
1920 67 33 n/a n/a
1919 74 35 n/a n/a
1918 65 40 n/a n/a
1917 89 41 n/a n/a
1916 79 32 0.00 n/a
1915 62 34 0.00 0.0
1914 58 47 0.00 n/a
1913 63 35 0.00 n/a
1912 83 40 0.00 n/a
1911 67 30 0.00 0.0
1910 64 36 0.00 n/a
1909 51 40 n/a n/a
1908 50 29 0.00 0.0
1907 63 33 0.00 n/a
1906 77 32 n/a n/a
1905 62 41 0.12 n/a
1904 77 35 0.00 n/a
1903 60 43 0.03 n/a
1902 56 39 0.29 n/a
1901 87 32 0.00 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 58 30 0.00 n/a
1894 60 45 0.00 n/a
1893 65 47 0.00 n/a
What's the all-time high for Riverside on 12/18?
For the date of Dec 18, the highest temperature ever reached in Riverside history is 89 °F which happened in 1917.
Highest Temperatures in Riverside on December 18
Rank Temperature Year
1 89 °F 1917
2 87 °F 1901
3 85 °F 1939
4 83 °F 1912
5 82 °F 1994
6 81 °F 1929
6 81 °F 2003
8 80 °F 1958
8 80 °F 1950
8 80 °F 1985
8 80 °F 2009
What's the all-time low for Riverside on 12/18?
For the date of Dec 18, the lowest temperature ever reached in Riverside history is 29 °F which has happened 2 times, most recently in 1924.
Lowest Temperatures in Riverside on December 18
Rank Temperature Year
1 29 °F 1924
1 29 °F 1908
3 30 °F 1948
3 30 °F 1911
3 30 °F 2001
3 30 °F 1895
7 31 °F 1932
7 31 °F 2006
9 32 °F 1927
9 32 °F 1951
9 32 °F 1975
9 32 °F 1901
9 32 °F 1906
9 32 °F 1953
9 32 °F 1916
9 32 °F 1968
Lowest High Temperatures in Riverside on December 18
Rank Temperature Year
1 50 °F 1967
1 50 °F 1908
3 51 °F 1909
4 53 °F 1984
4 53 °F 1970
6 54 °F 1924
6 54 °F 1978
8 55 °F 1988
8 55 °F 2006
8 55 °F 2008
What's the most it has ever rained in Riverside on 12/18?
For the date of Dec 18, the most precipitation ever recorded in Riverside history is 1.42 inches which happened in 1921.
All-Time Most Precipitation in Riverside on December 18
Rank Precipitation Year
1 1.42 inches 1921
2 0.67 inches 1938
3 0.62 inches 1978
4 0.51 inches 1967
5 0.50 inches 1984
6 0.30 inches 1940
7 0.29 inches 1902
8 0.24 inches 1988
9 0.22 inches 2010
10 0.16 inches 1949
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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