Livermore September 21 Weather Records

Daily averages and all-time records for weather in Livermore, California for the date of September 21.
September 21 All-Time Records
1903–2024
Highest temperature 104 °F 1943
Lowest temperature 40 °F 1960
Lowest daily high 70 °F 2017
Highest daily low 68 °F 1939
Most precipitation 0.46 inches 2013
September 21 Average Weather
1991–2020 1
Average high 84.2 °F
Average low 54.7 °F
Chance precipitation 3.4%
Livermore September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 79 51 0.00 n/a
2022 77 57 0.00 n/a
2021 96 57 0.00 n/a
2020 89 59 0.00 n/a
2019 88 52 0.00 n/a
2018 92 53 0.00 n/a
2017 70 51 0.00 n/a
2016 74 56 0.00 n/a
2015 103 65 0.00 n/a
2014 76 62 0.00 n/a
2013 72 58 0.46 n/a
2012 88 52 0.00 n/a
2011 100 55 0.00 n/a
2010 71 51 0.00 n/a
2009 97 60 0.00 n/a
2008 76 54 0.00 n/a
2007 80 56 0.00 n/a
2006 87 52 0.00 n/a
2005 86 55 0.00 n/a
2004 82 44 0.00 n/a
2003 100 56 0.00 n/a
2002 96 55 0.00 n/a
2001 86 54 0.00 n/a
2000 77 60 0.00 n/a
1999 91 52 0.00 n/a
1998 76 50 0.00 0.0
1997 92 53 0.00 0.0
1996 90 55 0.00 0.0
1995 88 56 0.00 0.0
1994 90 57 0.00 0.0
1993 80 51 0.00 0.0
1992 95 53 0.00 0.0
1991 92 52 0.00 0.0
1990 92 57 0.00 0.0
1989 82 52 0.00 0.0
1988 77 49 0.00 0.0
1987 100 54 0.00 0.0
1986 76 43 0.00 0.0
1985 92 51 0.00 0.0
1984 87 51 0.00 0.0
1983 93 64 0.00 0.0
1982 87 49 0.00 0.0
1981 90 48 0.00 0.0
1980 86 46 0.00 0.0
1979 90 49 0.00 0.0
1978 87 43 0.00 0.0
1977 82 48 0.00 0.0
1976 83 49 0.00 0.0
1975 87 49 0.00 0.0
1974 88 47 0.00 0.0
1973 84 46 0.00 0.0
1972 90 44 0.00 0.0
1971 84 50 0.00 0.0
1970 86 41 0.00 0.0
1969 83 51 0.00 0.0
1968 81 41 0.00 0.0
1967 99 58 0.00 0.0
1966 81 52 0.00 0.0
1965 85 43 0.00 0.0
1964 91 52 0.00 0.0
1963 78 45 0.00 0.0
1962 84 49 0.00 0.0
1961 78 50 0.00 0.0
1960 84 40 0.00 0.0
1959 70 48 0.00 0.0
1958 98 55 0.00 0.0
1957 94 60 0.00 0.0
1956 79 54 0.00 0.0
1955 85 45 0.00 0.0
1954 94 47 0.00 0.0
1953 75 54 0.00 0.0
1952 89 52 0.00 0.0
1951 87 52 0.00 0.0
1950 89 47 0.00 0.0
1949 103 57 0.00 0.0
1948 76 53 0.00 0.0
1947 101 n/a 0.00 0.0
1946 97 55 0.00 0.0
1945 78 59 0.00 0.0
1944 76 44 0.00 0.0
1943 104 58 0.00 n/a
1942 89 49 0.00 n/a
1941 80 46 0.00 n/a
1940 90 49 0.00 n/a
1939 103 68 0.00 n/a
1938 92 50 0.00 n/a
1937 92 53 0.00 n/a
1936 92 54 0.00 n/a
1935 83 52 0.00 0.0
1934 79 53 0.00 n/a
1933 78 46 0.00 n/a
1932 82 52 0.00 n/a
1931 93 54 0.00 n/a
1930 76 59 0.00 0.0
1929 78 50 0.00 n/a
1928 103 59 0.00 n/a
1927 77 48 0.00 n/a
1926 78 42 0.00 n/a
1925 81 44 0.00 n/a
1924 85 44 0.00 n/a
1923 74 58 0.00 n/a
1922 85 52 0.00 n/a
1921 91 49 0.00 n/a
1920 78 47 0.00 n/a
1919 96 59 0.00 n/a
1918 85 54 0.24 n/a
1917 73 50 0.01 n/a
1916 90 52 0.15 n/a
1915 83 43 0.00 n/a
1914 96 48 0.00 n/a
1913 87 59 0.00 n/a
1912 89 52 0.00 n/a
1911 79 51 0.00 n/a
1910 95 47 0.00 n/a
1909 93 49 0.00 n/a
1908 91 51 0.00 n/a
1907 n/a n/a n/a n/a
1906 75 51 0.00 n/a
1905 102 52 0.00 n/a
1904 74 54 0.00 n/a
1903 75 51 0.00 n/a
What's the all-time high for Livermore on 9/21?
For the date of Sep 21, the highest temperature ever reached in Livermore history is 104 °F which happened in 1943.
Highest Temperatures in Livermore on September 21
Rank Temperature Year
1 104 °F 1943
2 103 °F 1949
2 103 °F 2015
2 103 °F 1939
2 103 °F 1928
6 102 °F 1905
7 101 °F 1947
8 100 °F 2003
8 100 °F 1987
8 100 °F 2011
What's the all-time low for Livermore on 9/21?
For the date of Sep 21, the lowest temperature ever reached in Livermore history is 40 °F which happened in 1960.
Lowest Temperatures in Livermore on September 21
Rank Temperature Year
1 40 °F 1960
2 41 °F 1968
2 41 °F 1970
4 42 °F 1926
5 43 °F 1915
5 43 °F 1986
5 43 °F 1978
5 43 °F 1965
9 44 °F 1944
9 44 °F 1924
9 44 °F 1972
9 44 °F 2004
9 44 °F 1925
Lowest High Temperatures in Livermore on September 21
Rank Temperature Year
1 70 °F 2017
1 70 °F 1959
3 71 °F 2010
4 72 °F 2013
5 73 °F 1917
6 74 °F 1923
6 74 °F 1904
6 74 °F 2016
9 75 °F 1953
9 75 °F 1903
9 75 °F 1906
What's the most it has ever rained in Livermore on 9/21?
For the date of Sep 21, the most precipitation ever recorded in Livermore history is 0.46 inches which happened in 2013.
All-Time Most Precipitation in Livermore on September 21
Rank Precipitation Year
1 0.46 inches 2013
2 0.24 inches 1918
3 0.15 inches 1916
4 0.01 inches 1917
Weather Station Details
Years Station Coordinates
1999–2024 Livermore Municipal Airport location
1903–1998 Livermore location