Petaluma September 21 Weather Records

Daily averages and all-time records for weather in Petaluma, California for the date of September 21.
September 21 All-Time Records
1893–2024
Highest temperature 104 °F 1943
Lowest temperature 39 °F 1929
Lowest daily high 65 °F 1916
Highest daily low 64 °F 1939
Most precipitation 0.51 inches 2013
Most snow none -
September 21 Average Weather
1991–2020 1
Average high 80.5 °F
Average low 51.2 °F
Chance precipitation 4.4%
Chance snow 0%
Petaluma September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 75 48 0.00 n/a
2022 80 51 0.00 n/a
2021 93 51 0.00 n/a
2020 84 51 0.00 n/a
2019 90 50 0.00 n/a
2018 88 45 0.00 n/a
2017 74 48 0.00 n/a
2016 79 50 0.00 n/a
2015 98 54 0.00 n/a
2014 75 62 0.00 n/a
2013 81 59 0.51 n/a
2012 81 43 0.00 n/a
2011 90 50 0.00 n/a
2010 77 49 0.00 0.0
2009 87 51 0.00 0.0
2008 74 49 0.00 0.0
2007 78 47 0.00 0.0
2006 84 54 0.00 0.0
2005 80 54 0.00 0.0
2004 82 47 0.00 0.0
2003 99 51 0.00 0.0
2002 95 51 0.00 0.0
2001 77 51 0.00 0.0
2000 n/a 60 0.00 0.0
1999 79 53 0.00 0.0
1998 75 50 0.00 0.0
1997 84 53 0.00 0.0
1996 87 50 0.00 0.0
1995 72 55 0.00 0.0
1994 76 54 0.00 0.0
1993 75 43 0.00 0.0
1992 82 n/a 0.00 0.0
1991 n/a n/a n/a n/a
1990 87 49 0.00 0.0
1989 87 52 0.00 0.0
1988 76 45 0.00 0.0
1987 86 50 0.00 0.0
1986 75 43 0.00 0.0
1985 90 46 0.00 0.0
1984 85 49 0.00 0.0
1983 80 n/a 0.00 0.0
1982 89 45 0.00 0.0
1981 87 48 0.00 0.0
1980 85 47 0.00 0.0
1979 84 50 0.00 0.0
1978 80 43 0.00 0.0
1977 81 52 0.00 0.0
1976 77 53 0.00 0.0
1975 81 53 0.00 0.0
1974 83 52 0.00 0.0
1973 78 52 0.00 0.0
1972 85 46 0.00 0.0
1971 78 55 0.00 0.0
1970 81 45 0.00 0.0
1969 n/a n/a 0.00 0.0
1968 81 48 0.00 0.0
1967 90 58 0.00 0.0
1966 82 50 0.00 0.0
1965 83 50 0.00 0.0
1964 89 62 0.00 0.0
1963 80 47 0.00 0.0
1962 87 47 0.00 0.0
1961 75 54 0.00 0.0
1960 80 42 0.00 0.0
1959 85 53 0.00 0.0
1958 96 49 0.00 0.0
1957 92 52 0.00 0.0
1956 91 46 0.00 0.0
1955 81 46 0.00 0.0
1954 84 51 0.00 0.0
1953 70 61 0.00 0.0
1952 84 55 0.00 0.0
1951 76 52 0.00 0.0
1950 94 51 0.00 0.0
1949 102 54 0.00 0.0
1948 72 51 0.00 0.0
1947 n/a 46 0.00 0.0
1946 90 50 0.00 0.0
1945 68 52 0.00 0.0
1944 74 53 0.00 0.0
1943 104 54 0.00 0.0
1942 75 53 0.00 n/a
1941 82 51 0.00 n/a
1940 81 54 0.00 n/a
1939 104 64 0.00 n/a
1938 83 48 0.00 n/a
1937 82 42 0.00 n/a
1936 82 47 0.00 n/a
1935 76 50 0.00 0.0
1934 69 54 0.00 n/a
1933 74 46 0.00 n/a
1932 78 46 0.00 n/a
1931 89 56 0.00 n/a
1930 74 53 0.00 n/a
1929 79 39 n/a n/a
1928 102 50 0.00 n/a
1927 75 45 n/a n/a
1926 81 43 0.00 n/a
1925 86 42 0.00 n/a
1924 90 47 0.00 0.0
1923 76 60 0.01 n/a
1922 83 42 n/a n/a
1921 89 49 0.00 n/a
1920 79 49 0.00 n/a
1919 89 48 0.00 n/a
1918 70 47 0.04 n/a
1917 67 48 0.03 n/a
1916 65 53 0.40 n/a
1915 76 51 n/a n/a
1914 92 41 0.00 n/a
1913 79 54 0.00 n/a
1912 n/a n/a n/a n/a
1911 n/a n/a n/a n/a
1910 n/a n/a n/a n/a
1909 n/a n/a n/a n/a
1908 n/a n/a n/a n/a
1907 n/a n/a n/a n/a
1906 n/a n/a n/a n/a
1905 n/a n/a n/a n/a
1904 n/a n/a n/a n/a
1903 n/a n/a n/a n/a
1902 n/a n/a n/a 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 n/a n/a 0.00 n/a
1894 n/a n/a 0.00 n/a
1893 n/a n/a n/a n/a
What's the all-time high for Petaluma on 9/21?
For the date of Sep 21, the highest temperature ever reached in Petaluma history is 104 °F which has happened 2 times, most recently in 1943.
Highest Temperatures in Petaluma on September 21
Rank Temperature Year
1 104 °F 1943
1 104 °F 1939
3 102 °F 1928
3 102 °F 1949
5 99 °F 2003
6 98 °F 2015
7 96 °F 1958
8 95 °F 2002
9 94 °F 1950
10 93 °F 2021
What's the all-time low for Petaluma on 9/21?
For the date of Sep 21, the lowest temperature ever reached in Petaluma history is 39 °F which happened in 1929.
Lowest Temperatures in Petaluma on September 21
Rank Temperature Year
1 39 °F 1929
2 41 °F 1914
3 42 °F 1960
3 42 °F 1925
3 42 °F 1937
3 42 °F 1922
7 43 °F 1926
7 43 °F 1978
7 43 °F 2012
7 43 °F 1993
7 43 °F 1986
Lowest High Temperatures in Petaluma on September 21
Rank Temperature Year
1 65 °F 1916
2 67 °F 1917
3 68 °F 1945
4 69 °F 1934
5 70 °F 1953
5 70 °F 1918
7 72 °F 1948
7 72 °F 1995
9 74 °F 1944
9 74 °F 2017
9 74 °F 2008
9 74 °F 1930
9 74 °F 1933
What's the most it has ever rained in Petaluma on 9/21?
For the date of Sep 21, the most precipitation ever recorded in Petaluma history is 0.51 inches which happened in 2013.
All-Time Most Precipitation in Petaluma on September 21
Rank Precipitation Year
1 0.51 inches 2013
2 0.40 inches 1916
3 0.04 inches 1918
4 0.03 inches 1917
5 0.01 inches 1923
Weather Station Details
Years Station Coordinates
1893–2024 Petaluma Airport location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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