Riverside October 21 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of October 21.
October 21 All-Time Records
1893–2024
Highest temperature 103 °F 2003
Lowest temperature 32 °F 1949
Lowest daily high 63 °F 1931
Highest daily low 63 °F 1992
Most precipitation 0.25 inches 1957
October 21 Average Weather
1991–2020 1
Average high 82.2 °F
Average low 53.8 °F
Chance precipitation 7.6%
Riverside October 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 90 61 0.00 n/a
2022 85 59 0.00 n/a
2021 84 48 0.00 n/a
2020 79 60 0.00 0.0
2019 94 56 0.00 0.0
2018 85 57 0.00 0.0
2017 85 53 0.00 0.0
2016 96 58 0.00 0.0
2015 86 58 0.00 0.0
2014 82 58 0.00 0.0
2013 84 51 0.00 0.0
2012 74 61 0.00 0.0
2011 78 58 0.00 0.0
2010 65 59 0.01 n/a
2009 85 52 0.00 n/a
2008 94 52 0.00 n/a
2007 n/a n/a n/a n/a
2006 92 46 0.00 n/a
2005 77 57 0.00 n/a
2004 67 52 0.14 n/a
2003 103 56 0.00 n/a
2002 67 54 0.00 n/a
2001 74 56 0.00 n/a
2000 71 59 0.02 n/a
1999 96 50 0.00 n/a
1998 81 51 0.00 0.0
1997 75 57 0.00 0.0
1996 72 52 0.00 0.0
1995 n/a 55 0.00 0.0
1994 83 47 0.00 0.0
1993 87 51 0.00 0.0
1992 n/a 63 0.00 0.0
1991 84 61 0.00 0.0
1990 88 48 0.00 0.0
1989 74 59 0.01 0.0
1988 83 59 0.00 0.0
1987 83 56 0.00 0.0
1986 85 44 0.00 0.0
1985 73 56 0.00 0.0
1984 73 47 0.00 0.0
1983 91 53 0.00 0.0
1982 81 52 0.00 0.0
1981 82 49 0.00 0.0
1980 88 48 0.00 0.0
1979 75 46 0.00 0.0
1978 78 45 0.10 0.0
1977 72 57 0.00 0.0
1976 79 63 0.00 0.0
1975 73 51 0.00 0.0
1974 70 56 0.00 0.0
1973 78 53 0.00 0.0
1972 72 45 0.00 0.0
1971 81 42 0.00 0.0
1970 72 51 0.00 0.0
1969 77 48 0.00 0.0
1968 85 47 0.00 0.0
1967 82 50 0.00 0.0
1966 79 49 0.00 0.0
1965 98 53 0.00 0.0
1964 93 53 0.00 0.0
1963 82 49 0.00 0.0
1962 90 46 0.00 0.0
1961 70 58 0.00 0.0
1960 95 49 0.00 0.0
1959 76 48 0.00 0.0
1958 86 49 0.00 0.0
1957 66 48 0.25 0.0
1956 89 49 0.00 0.0
1955 67 55 0.00 0.0
1954 90 46 0.00 0.0
1953 78 40 0.00 0.0
1952 82 44 0.00 0.0
1951 75 48 0.00 0.0
1950 75 47 0.00 0.0
1949 75 32 0.00 0.0
1948 86 47 0.00 0.0
1947 77 n/a 0.00 0.0
1946 90 40 0.00 0.0
1945 83 53 0.00 0.0
1944 78 50 0.00 0.0
1943 n/a n/a n/a n/a
1942 98 48 0.00 0.0
1941 65 45 0.06 0.0
1940 96 49 0.00 0.0
1939 97 50 0.00 0.0
1938 88 43 0.00 0.0
1937 98 48 0.00 0.0
1936 70 55 0.00 0.0
1935 85 44 0.00 0.0
1934 81 45 0.00 0.0
1933 83 46 0.00 0.0
1932 76 40 0.00 0.0
1931 63 51 0.00 0.0
1930 70 44 0.00 0.0
1929 97 50 0.00 0.0
1928 77 44 0.00 0.0
1927 90 50 0.00 n/a
1926 74 50 n/a n/a
1925 84 46 n/a n/a
1924 89 41 n/a n/a
1923 84 45 n/a n/a
1922 92 43 n/a n/a
1921 84 47 n/a n/a
1920 72 34 n/a n/a
1919 88 38 n/a n/a
1918 78 52 n/a n/a
1917 101 44 n/a n/a
1916 80 40 0.00 0.0
1915 100 43 n/a n/a
1914 69 56 0.18 n/a
1913 93 49 0.00 n/a
1912 79 45 0.00 n/a
1911 90 44 0.00 n/a
1910 86 44 0.00 n/a
1909 79 49 n/a n/a
1908 69 43 0.00 n/a
1907 n/a n/a 0.00 n/a
1906 68 42 n/a n/a
1905 71 47 0.00 n/a
1904 90 45 0.00 n/a
1903 86 43 0.00 n/a
1902 79 57 0.00 n/a
1901 92 50 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 74 57 0.00 n/a
1894 75 54 n/a n/a
1893 71 41 0.00 n/a
What's the all-time high for Riverside on 10/21?
For the date of Oct 21, the highest temperature ever reached in Riverside history is 103 °F which happened in 2003.
Highest Temperatures in Riverside on October 21
Rank Temperature Year
1 103 °F 2003
2 101 °F 1917
3 100 °F 1915
4 98 °F 1942
4 98 °F 1965
4 98 °F 1937
7 97 °F 1939
7 97 °F 1929
9 96 °F 1940
9 96 °F 1999
9 96 °F 2016
What's the all-time low for Riverside on 10/21?
For the date of Oct 21, the lowest temperature ever reached in Riverside history is 32 °F which happened in 1949.
Lowest Temperatures in Riverside on October 21
Rank Temperature Year
1 32 °F 1949
2 34 °F 1920
3 38 °F 1919
4 40 °F 1953
4 40 °F 1946
4 40 °F 1932
4 40 °F 1916
8 41 °F 1893
8 41 °F 1924
10 42 °F 1971
10 42 °F 1906
Lowest High Temperatures in Riverside on October 21
Rank Temperature Year
1 63 °F 1931
2 65 °F 2010
2 65 °F 1941
4 66 °F 1957
5 67 °F 2002
5 67 °F 1955
5 67 °F 2004
8 68 °F 1906
9 69 °F 1914
9 69 °F 1908
What's the most it has ever rained in Riverside on 10/21?
For the date of Oct 21, the most precipitation ever recorded in Riverside history is 0.25 inches which happened in 1957.
All-Time Most Precipitation in Riverside on October 21
Rank Precipitation Year
1 0.25 inches 1957
2 0.18 inches 1914
3 0.14 inches 2004
4 0.10 inches 1978
5 0.06 inches 1941
6 0.02 inches 2000
7 0.01 inches 1989
7 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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