Riverside December 20 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of December 20.
December 20 All-Time Records
1893–2024
Highest temperature 87 °F 1939
Lowest temperature 27 °F 2006
Lowest daily high 48 °F 1952
Highest daily low 57 °F 1921
Most precipitation 2.04 inches 1921
December 20 Average Weather
1991–2020 1
Average high 67.4 °F
Average low 42.2 °F
Chance precipitation 17.7%
Riverside December 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 69 53 0.22 n/a
2022 67 40 0.00 n/a
2021 70 35 0.00 n/a
2020 84 41 0.00 n/a
2019 74 41 0.00 0.0
2018 80 46 0.00 0.0
2017 63 40 0.00 n/a
2016 76 50 0.00 0.0
2015 60 43 0.00 0.0
2014 59 45 0.00 0.0
2013 64 53 0.00 0.0
2012 65 42 0.00 0.0
2011 67 42 0.00 0.0
2010 60 54 0.61 n/a
2009 71 48 0.00 n/a
2008 61 35 0.00 n/a
2007 n/a n/a n/a n/a
2006 58 27 0.00 n/a
2005 78 43 0.00 n/a
2004 72 37 0.00 n/a
2003 65 44 0.00 n/a
2002 57 44 0.51 n/a
2001 57 38 0.02 n/a
2000 74 35 0.00 n/a
1999 79 n/a 0.00 n/a
1998 59 47 0.00 0.0
1997 72 37 0.00 0.0
1996 76 35 0.00 0.0
1995 65 43 0.00 0.0
1994 83 40 0.00 0.0
1993 63 40 0.00 0.0
1992 62 30 0.00 0.0
1991 67 53 0.00 0.0
1990 54 40 0.00 0.0
1989 71 36 0.00 0.0
1988 60 40 0.00 0.0
1987 67 36 0.00 0.0
1986 66 46 0.00 0.0
1985 83 40 0.00 0.0
1984 58 41 0.47 0.0
1983 66 45 0.00 0.0
1982 72 35 0.00 0.0
1981 65 42 0.00 0.0
1980 78 39 0.00 0.0
1979 65 38 0.00 0.0
1978 59 32 0.00 0.0
1977 64 45 0.00 0.0
1976 72 39 0.00 0.0
1975 67 34 0.48 0.0
1974 75 37 0.00 0.0
1973 72 n/a 0.00 0.0
1972 78 43 0.00 0.0
1971 61 31 0.00 0.0
1970 52 34 0.03 0.0
1969 66 54 0.00 0.0
1968 50 40 0.20 0.0
1967 53 30 0.00 0.0
1966 72 38 0.00 0.0
1965 71 39 0.00 0.0
1964 57 47 0.03 0.0
1963 64 38 0.00 0.0
1962 75 42 0.00 0.0
1961 74 39 0.00 0.0
1960 79 44 0.00 0.0
1959 69 51 0.00 0.0
1958 71 36 0.00 0.0
1957 71 38 0.00 0.0
1956 73 35 0.00 0.0
1955 70 34 0.00 0.0
1954 77 45 0.00 0.0
1953 73 35 0.00 0.0
1952 48 46 0.85 0.0
1951 58 32 0.00 0.0
1950 78 32 0.00 0.0
1949 50 30 0.00 0.0
1948 65 27 0.00 0.0
1947 72 36 0.00 0.0
1946 76 39 0.00 0.0
1945 70 34 0.00 0.0
1944 78 37 0.00 0.0
1943 63 52 0.06 0.0
1942 74 34 0.00 0.0
1941 65 36 0.00 0.0
1940 68 44 0.00 0.0
1939 87 38 0.00 0.0
1938 62 50 1.36 0.0
1937 76 53 0.00 0.0
1936 70 50 0.00 0.0
1935 69 49 0.05 0.0
1934 72 40 0.00 0.0
1933 78 35 0.00 n/a
1932 59 37 0.00 0.0
1931 67 37 0.00 n/a
1930 67 32 0.00 n/a
1929 70 56 0.00 0.0
1928 65 31 0.00 n/a
1927 63 29 0.00 n/a
1926 69 36 n/a n/a
1925 69 40 n/a n/a
1924 63 37 n/a n/a
1923 62 33 n/a n/a
1922 79 46 n/a n/a
1921 57 57 2.04 n/a
1920 59 34 n/a n/a
1919 81 35 n/a n/a
1918 56 32 0.10 n/a
1917 86 39 n/a n/a
1916 58 41 0.00 n/a
1915 77 32 0.00 0.0
1914 58 39 0.40 n/a
1913 60 43 0.00 n/a
1912 68 52 0.00 n/a
1911 64 30 0.00 0.0
1910 52 37 0.00 n/a
1909 50 38 0.55 n/a
1908 68 29 0.00 0.0
1907 62 39 0.00 n/a
1906 85 32 n/a n/a
1905 58 47 0.18 n/a
1904 83 35 0.00 n/a
1903 77 33 0.00 n/a
1902 66 33 0.00 n/a
1901 75 37 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 51 33 0.00 n/a
1894 59 36 0.00 n/a
1893 62 43 0.00 n/a
What's the all-time high for Riverside on 12/20?
For the date of Dec 20, the highest temperature ever reached in Riverside history is 87 °F which happened in 1939.
Highest Temperatures in Riverside on December 20
Rank Temperature Year
1 87 °F 1939
2 86 °F 1917
3 85 °F 1906
4 84 °F 2020
5 83 °F 1994
5 83 °F 1904
5 83 °F 1985
8 81 °F 1919
9 80 °F 2018
10 79 °F 1922
10 79 °F 1960
10 79 °F 1999
What's the all-time low for Riverside on 12/20?
For the date of Dec 20, the lowest temperature ever reached in Riverside history is 27 °F which has happened 2 times, most recently in 2006.
Lowest Temperatures in Riverside on December 20
Rank Temperature Year
1 27 °F 2006
1 27 °F 1948
3 29 °F 1908
3 29 °F 1927
5 30 °F 1911
5 30 °F 1949
5 30 °F 1967
5 30 °F 1992
9 31 °F 1928
9 31 °F 1971
Lowest High Temperatures in Riverside on December 20
Rank Temperature Year
1 48 °F 1952
2 50 °F 1968
2 50 °F 1909
2 50 °F 1949
5 51 °F 1895
6 52 °F 1910
6 52 °F 1970
8 53 °F 1967
9 54 °F 1990
10 56 °F 1918
What's the most it has ever rained in Riverside on 12/20?
For the date of Dec 20, the most precipitation ever recorded in Riverside history is 2.04 inches which happened in 1921.
All-Time Most Precipitation in Riverside on December 20
Rank Precipitation Year
1 2.04 inches 1921
2 1.36 inches 1938
3 0.85 inches 1952
4 0.61 inches 2010
5 0.55 inches 1909
6 0.51 inches 2002
7 0.48 inches 1975
8 0.47 inches 1984
9 0.40 inches 1914
10 0.22 inches 2023
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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