Riverside September 30 Weather Records

Daily averages and all-time records for weather in Riverside, California for the date of September 30.
September 30 All-Time Records
1893–2024
Highest temperature 108 °F 2020
Lowest temperature 42 °F 1948
Lowest daily high 67 °F 1983
Highest daily low 68 °F 2010
Most precipitation 1.72 inches 1921
September 30 Average Weather
1991–2020 1
Average high 88.4 °F
Average low 58.4 °F
Chance precipitation 3.0%
Riverside September 30 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 71 59 0.00 n/a
2022 88 62 0.00 n/a
2021 93 53 0.00 n/a
2020 108 66 0.00 0.0
2019 77 50 0.00 0.0
2018 94 61 0.00 0.0
2017 88 58 0.00 0.0
2016 95 67 0.00 0.0
2015 95 61 0.00 0.0
2014 90 59 0.00 0.0
2013 90 54 0.00 0.0
2012 104 65 0.00 0.0
2011 92 60 0.00 0.0
2010 88 68 0.01 n/a
2009 83 57 0.00 n/a
2008 103 67 0.00 n/a
2007 n/a n/a n/a n/a
2006 87 54 0.00 n/a
2005 97 60 0.00 n/a
2004 70 56 0.00 n/a
2003 90 61 0.00 n/a
2002 70 53 0.00 n/a
2001 108 61 0.00 n/a
2000 81 55 0.00 n/a
1999 102 58 0.00 n/a
1998 77 56 0.00 0.0
1997 93 68 0.00 0.0
1996 91 56 0.00 0.0
1995 94 54 0.00 0.0
1994 86 56 0.00 0.0
1993 98 61 0.00 0.0
1992 n/a n/a n/a n/a
1991 99 62 0.00 0.0
1990 97 57 0.00 0.0
1989 87 57 0.00 0.0
1988 97 57 0.00 0.0
1987 106 63 0.00 0.0
1986 n/a n/a 0.00 0.0
1985 84 60 0.00 0.0
1984 92 58 0.00 0.0
1983 67 59 0.64 0.0
1982 77 47 0.00 0.0
1981 82 53 0.00 0.0
1980 108 58 0.00 0.0
1979 83 60 0.00 0.0
1978 93 61 0.00 0.0
1977 83 62 0.00 0.0
1976 82 65 0.00 0.0
1975 83 58 0.00 0.0
1974 95 57 0.00 0.0
1973 86 50 0.00 0.0
1972 97 58 0.00 0.0
1971 72 48 0.00 0.0
1970 93 56 0.00 0.0
1969 96 57 0.00 0.0
1968 73 54 0.00 0.0
1967 81 63 0.00 0.0
1966 85 60 0.00 0.0
1965 92 55 0.00 0.0
1964 89 47 0.00 0.0
1963 96 61 0.00 0.0
1962 90 54 0.00 0.0
1961 86 51 0.00 0.0
1960 79 55 0.00 0.0
1959 77 55 0.00 0.0
1958 94 56 0.00 0.0
1957 89 55 0.00 0.0
1956 94 56 0.00 0.0
1955 91 45 0.00 0.0
1954 80 55 0.00 0.0
1953 86 53 0.00 0.0
1952 91 54 0.00 0.0
1951 88 49 0.00 0.0
1950 77 52 0.00 0.0
1949 96 46 0.00 0.0
1948 87 42 0.00 0.0
1947 84 53 0.00 0.0
1946 82 61 0.15 0.0
1945 96 45 0.00 0.0
1944 72 58 0.00 0.0
1943 104 55 0.00 0.0
1942 88 48 0.00 0.0
1941 101 48 0.00 0.0
1940 88 43 0.00 0.0
1939 88 53 0.00 0.0
1938 93 56 0.00 0.0
1937 78 60 0.00 0.0
1936 96 48 0.00 0.0
1935 89 51 0.00 0.0
1934 103 48 0.00 0.0
1933 85 54 0.00 0.0
1932 86 53 0.00 0.0
1931 85 55 0.00 0.0
1930 71 45 0.00 0.0
1929 89 44 0.00 0.0
1928 86 49 0.00 0.0
1927 84 50 0.00 n/a
1926 87 44 0.00 n/a
1925 100 45 0.00 n/a
1924 102 52 0.00 n/a
1923 92 49 0.00 n/a
1922 96 47 0.00 n/a
1921 73 n/a 1.72 n/a
1920 91 47 0.00 n/a
1919 70 55 0.05 n/a
1918 97 64 0.00 n/a
1917 91 50 n/a n/a
1916 68 63 0.86 n/a
1915 87 42 0.00 n/a
1914 82 49 0.00 n/a
1913 90 52 n/a n/a
1912 99 52 0.00 n/a
1911 80 62 0.59 0.0
1910 89 54 0.00 n/a
1909 81 54 0.00 n/a
1908 98 51 0.00 n/a
1907 81 44 0.00 n/a
1906 103 61 0.02 n/a
1905 86 45 0.00 n/a
1904 93 49 0.00 n/a
1903 67 55 0.00 n/a
1902 88 45 0.00 n/a
1901 73 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 95 56 n/a n/a
1894 67 52 n/a n/a
1893 75 50 n/a n/a
What's the all-time high for Riverside on 9/30?
For the date of Sep 30, the highest temperature ever reached in Riverside history is 108 °F which has happened 3 times, most recently in 2020.
Highest Temperatures in Riverside on September 30
Rank Temperature Year
1 108 °F 2020
1 108 °F 2001
1 108 °F 1980
4 106 °F 1987
5 104 °F 2012
5 104 °F 1943
7 103 °F 1934
7 103 °F 2008
7 103 °F 1906
10 102 °F 1999
10 102 °F 1924
What's the all-time low for Riverside on 9/30?
For the date of Sep 30, the lowest temperature ever reached in Riverside history is 42 °F which has happened 2 times, most recently in 1948.
Lowest Temperatures in Riverside on September 30
Rank Temperature Year
1 42 °F 1915
1 42 °F 1948
3 43 °F 1940
4 44 °F 1926
4 44 °F 1929
4 44 °F 1907
7 45 °F 1930
7 45 °F 1905
7 45 °F 1955
7 45 °F 1925
7 45 °F 1945
7 45 °F 1902
Lowest High Temperatures in Riverside on September 30
Rank Temperature Year
1 67 °F 1894
1 67 °F 1903
1 67 °F 1983
4 68 °F 1916
5 70 °F 2004
5 70 °F 2002
5 70 °F 1919
8 71 °F 2023
8 71 °F 1930
10 72 °F 1971
10 72 °F 1944
What's the most it has ever rained in Riverside on 9/30?
For the date of Sep 30, the most precipitation ever recorded in Riverside history is 1.72 inches which happened in 1921.
All-Time Most Precipitation in Riverside on September 30
Rank Precipitation Year
1 1.72 inches 1921
2 0.86 inches 1916
3 0.64 inches 1983
4 0.59 inches 1911
5 0.15 inches 1946
6 0.05 inches 1919
7 0.02 inches 1906
8 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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