Riverside April 21 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of April 21.
April 21 All-Time Records
1893–2024
Highest temperature 101 °F 2009
Lowest temperature 33 °F 1904
Lowest daily high 56 °F 1925
Highest daily low 63 °F 2009
Most precipitation 0.43 inches 1953
April 21 Average Weather
1991–2020 1
Average high 77.7 °F
Average low 50.6 °F
Chance precipitation 10.0%
Riverside April 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 84 52 0.00 n/a
2023 91 53 0.00 n/a
2022 73 47 0.00 n/a
2021 68 55 0.00 n/a
2020 74 53 0.00 0.0
2019 72 53 0.00 0.0
2018 91 49 0.00 0.0
2017 95 55 0.00 0.0
2016 87 55 0.00 0.0
2015 67 56 0.00 0.0
2014 89 55 0.00 0.0
2013 88 55 0.00 0.0
2012 92 57 0.00 0.0
2011 71 55 0.00 n/a
2010 61 46 0.06 n/a
2009 101 63 0.00 n/a
2008 n/a n/a n/a n/a
2007 63 42 0.00 n/a
2006 73 52 0.00 n/a
2005 84 44 0.00 n/a
2004 73 49 0.00 n/a
2003 66 49 0.00 n/a
2002 83 42 0.00 n/a
2001 62 42 0.23 n/a
2000 68 50 0.00 n/a
1999 70 53 0.00 n/a
1998 96 52 0.00 0.0
1997 87 55 0.00 0.0
1996 75 47 0.00 0.0
1995 70 42 0.00 0.0
1994 77 58 0.00 0.0
1993 89 53 0.00 0.0
1992 84 54 0.00 0.0
1991 69 53 0.07 0.0
1990 77 57 0.00 0.0
1989 84 56 0.00 0.0
1988 64 48 0.01 0.0
1987 95 57 0.00 0.0
1986 90 49 0.00 0.0
1985 62 48 0.00 0.0
1984 88 47 0.00 0.0
1983 68 52 0.34 0.0
1982 78 48 0.00 0.0
1981 83 45 0.00 0.0
1980 70 57 0.00 0.0
1979 83 45 0.00 0.0
1978 71 47 0.00 0.0
1977 85 45 0.00 0.0
1976 86 50 0.00 0.0
1975 76 45 0.00 0.0
1974 85 44 0.00 0.0
1973 79 43 0.00 0.0
1972 83 36 0.00 0.0
1971 64 46 0.00 0.0
1970 64 46 0.00 0.0
1969 80 51 0.00 0.0
1968 68 44 0.00 0.0
1967 61 38 0.10 0.0
1966 76 42 0.00 0.0
1965 85 51 0.00 0.0
1964 75 42 0.00 0.0
1963 64 41 0.13 0.0
1962 86 45 0.00 0.0
1961 71 47 0.00 0.0
1960 80 51 0.00 0.0
1959 80 50 0.00 0.0
1958 93 55 0.00 0.0
1957 62 39 0.03 0.0
1956 91 53 0.00 0.0
1955 69 36 0.00 0.0
1954 72 52 0.00 0.0
1953 67 45 0.43 0.0
1952 67 54 0.00 0.0
1951 75 54 0.00 0.0
1950 72 52 0.00 0.0
1949 96 48 0.00 0.0
1948 67 50 0.00 0.0
1947 73 54 0.00 0.0
1946 80 44 0.00 0.0
1945 70 51 0.00 0.0
1944 72 37 0.00 0.0
1943 77 54 0.00 0.0
1942 62 56 0.00 0.0
1941 79 44 0.00 0.0
1940 81 53 0.00 0.0
1939 89 49 0.00 0.0
1938 74 57 0.00 0.0
1937 90 44 0.00 0.0
1936 75 55 0.00 0.0
1935 80 41 0.00 0.0
1934 85 54 0.00 0.0
1933 60 35 0.00 0.0
1932 62 36 0.00 n/a
1931 87 47 0.00 0.0
1930 88 49 0.00 0.0
1929 70 51 0.00 n/a
1928 68 41 0.00 n/a
1927 95 45 0.00 n/a
1926 86 51 n/a n/a
1925 56 43 0.19 n/a
1924 79 48 n/a n/a
1923 67 53 n/a n/a
1922 86 43 n/a n/a
1921 90 40 0.00 n/a
1920 67 45 n/a n/a
1919 84 44 0.00 n/a
1918 88 43 n/a n/a
1917 88 43 n/a n/a
1916 89 45 n/a n/a
1915 63 50 0.34 n/a
1914 70 57 0.05 n/a
1913 79 43 0.00 n/a
1912 70 38 0.00 n/a
1911 76 50 0.00 n/a
1910 94 46 0.00 n/a
1909 68 52 0.03 n/a
1908 68 53 n/a n/a
1907 83 39 n/a n/a
1906 89 44 n/a 0.0
1905 66 52 0.00 n/a
1904 65 33 0.00 n/a
1903 76 42 0.00 n/a
1902 65 44 0.23 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 75 54 0.00 n/a
1894 85 49 n/a n/a
1893 86 50 0.00 n/a
What's the all-time high for Riverside on 4/21?
For the date of Apr 21, the highest temperature ever reached in Riverside history is 101 °F which happened in 2009.
Highest Temperatures in Riverside on April 21
Rank Temperature Year
1 101 °F 2009
2 96 °F 1998
2 96 °F 1949
4 95 °F 1987
4 95 °F 1927
4 95 °F 2017
7 94 °F 1910
8 93 °F 1958
9 92 °F 2012
10 91 °F 2018
10 91 °F 2023
10 91 °F 1956
What's the all-time low for Riverside on 4/21?
For the date of Apr 21, the lowest temperature ever reached in Riverside history is 33 °F which happened in 1904.
Lowest Temperatures in Riverside on April 21
Rank Temperature Year
1 33 °F 1904
2 35 °F 1933
3 36 °F 1972
3 36 °F 1955
3 36 °F 1932
6 37 °F 1944
7 38 °F 1912
7 38 °F 1967
9 39 °F 1957
9 39 °F 1907
Lowest High Temperatures in Riverside on April 21
Rank Temperature Year
1 56 °F 1925
2 60 °F 1933
3 61 °F 1967
3 61 °F 2010
5 62 °F 1942
5 62 °F 2001
5 62 °F 1932
5 62 °F 1985
5 62 °F 1957
10 63 °F 1915
10 63 °F 2007
What's the most it has ever rained in Riverside on 4/21?
For the date of Apr 21, the most precipitation ever recorded in Riverside history is 0.43 inches which happened in 1953.
All-Time Most Precipitation in Riverside on April 21
Rank Precipitation Year
1 0.43 inches 1953
2 0.34 inches 1915
2 0.34 inches 1983
4 0.23 inches 1902
4 0.23 inches 2001
6 0.19 inches 1925
7 0.13 inches 1963
8 0.10 inches 1967
9 0.07 inches 1991
10 0.06 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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