San Antonio September 21 Weather Records

Daily averages and all-time records for weather in San Antonio, Texas for the date of September 21.
September 21 All-Time Records
1893–2024
Highest temperature 101 °F 1904
Lowest temperature 48 °F 1913
Lowest daily high 73 °F 1983
Highest daily low 80 °F 1980
Most precipitation 2.73 inches 1928
Most snow none -
September 21 Average Weather
1991–2020 1
Average high 89.7 °F
Average low 68.6 °F
Chance precipitation 21.6%
Chance snow 0%
San Antonio September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 98 76 0.00 0.0
2022 95 73 0.00 0.0
2021 96 79 0.05 0.0
2020 75 68 0.58 0.0
2019 94 76 0.00 0.0
2018 87 78 0.00 0.0
2017 95 75 0.00 0.0
2016 93 75 0.00 0.0
2015 93 75 0.00 0.0
2014 94 75 0.00 0.0
2013 89 63 0.00 0.0
2012 89 60 0.00 0.0
2011 94 71 0.00 0.0
2010 87 72 0.02 0.0
2009 96 76 0.00 0.0
2008 90 64 0.00 0.0
2007 90 67 0.00 0.0
2006 94 65 0.00 0.0
2005 97 71 0.00 0.0
2004 93 69 0.00 0.0
2003 74 66 0.48 0.0
2002 88 60 0.00 0.0
2001 90 73 0.00 0.0
2000 89 75 0.00 0.0
1999 86 69 0.00 n/a
1998 89 74 0.00 n/a
1997 89 74 0.00 n/a
1996 88 71 0.00 n/a
1995 79 54 0.31 0.0
1994 90 61 0.00 0.0
1993 97 76 0.00 0.0
1992 97 76 0.00 0.0
1991 83 60 0.00 0.0
1990 92 77 0.00 0.0
1989 92 67 0.00 0.0
1988 91 74 0.00 0.0
1987 89 65 0.00 0.0
1986 91 76 0.02 0.0
1985 88 65 0.00 0.0
1984 77 66 0.00 0.0
1983 73 54 0.00 0.0
1982 83 61 0.00 0.0
1981 92 58 0.00 0.0
1980 97 80 0.00 0.0
1979 88 65 0.00 0.0
1978 87 71 0.00 0.0
1977 90 71 0.00 0.0
1976 84 60 0.00 0.0
1975 78 60 0.00 0.0
1974 84 72 0.00 0.0
1973 90 74 0.00 0.0
1972 89 72 0.00 0.0
1971 74 60 0.53 0.0
1970 93 76 0.00 0.0
1969 91 70 0.26 0.0
1968 93 74 0.04 0.0
1967 75 71 2.45 0.0
1966 88 55 0.00 0.0
1965 97 78 0.00 0.0
1964 88 77 0.50 0.0
1963 91 65 0.00 0.0
1962 91 71 0.00 0.0
1961 93 73 0.00 0.0
1960 92 67 0.00 0.0
1959 91 72 0.00 0.0
1958 87 73 0.67 0.0
1957 96 78 0.00 0.0
1956 96 66 0.00 0.0
1955 94 76 0.08 0.0
1954 92 72 0.00 0.0
1953 96 66 0.00 0.0
1952 90 68 0.00 0.0
1951 93 65 0.00 0.0
1950 92 74 0.00 0.0
1949 90 70 0.00 0.0
1948 92 71 0.00 0.0
1947 97 66 0.00 0.0
1946 n/a n/a n/a n/a
1945 n/a n/a n/a n/a
1944 n/a n/a n/a n/a
1943 n/a n/a n/a n/a
1942 n/a n/a n/a n/a
1941 n/a n/a n/a n/a
1940 n/a n/a n/a n/a
1939 n/a n/a n/a n/a
1938 n/a n/a n/a n/a
1937 n/a n/a n/a n/a
1936 n/a n/a n/a n/a
1935 91 69 0.00 0.0
1934 92 75 0.00 0.0
1933 96 75 0.00 0.0
1932 93 70 0.00 0.0
1931 96 70 0.00 0.0
1930 97 68 0.00 0.0
1929 89 59 0.00 0.0
1928 77 63 2.73 0.0
1927 87 62 0.00 0.0
1926 100 66 0.00 0.0
1925 95 75 0.00 0.0
1924 96 67 0.04 0.0
1923 87 60 0.00 0.0
1922 90 57 0.00 0.0
1921 93 74 0.03 0.0
1920 n/a n/a n/a n/a
1919 78 n/a 0.00 0.0
1918 74 53 0.00 0.0
1917 84 69 0.16 0.0
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 96 71 0.00 0.0
1913 81 48 0.00 0.0
1912 74 62 0.75 0.0
1911 97 73 0.00 0.0
1910 n/a n/a 0.00 0.0
1909 96 64 0.00 0.0
1908 90 67 0.00 0.0
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 101 77 0.00 0.0
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 90 59 0.00 n/a
1898 91 70 0.00 0.0
1897 86 59 0.00 0.0
1896 83 62 0.00 n/a
1895 92 73 n/a n/a
1894 85 66 0.00 n/a
1893 90 72 0.01 n/a
What's the all-time high for San Antonio on 9/21?
For the date of Sep 21, the highest temperature ever reached in San Antonio history is 101 °F which happened in 1904.
Highest Temperatures in San Antonio on September 21
Rank Temperature Year
1 101 °F 1904
2 100 °F 1926
3 98 °F 2023
4 97 °F 2005
4 97 °F 1993
4 97 °F 1992
4 97 °F 1947
4 97 °F 1980
4 97 °F 1965
4 97 °F 1930
4 97 °F 1911
What's the all-time low for San Antonio on 9/21?
For the date of Sep 21, the lowest temperature ever reached in San Antonio history is 48 °F which happened in 1913.
Lowest Temperatures in San Antonio on September 21
Rank Temperature Year
1 48 °F 1913
2 53 °F 1918
3 54 °F 1995
3 54 °F 1983
5 55 °F 1966
6 57 °F 1922
7 58 °F 1981
8 59 °F 1897
8 59 °F 1899
8 59 °F 1929
Lowest High Temperatures in San Antonio on September 21
Rank Temperature Year
1 73 °F 1983
2 74 °F 1971
2 74 °F 2003
2 74 °F 1912
2 74 °F 1918
6 75 °F 1967
6 75 °F 2020
8 77 °F 1928
8 77 °F 1984
10 78 °F 1919
10 78 °F 1975
What's the most it has ever rained in San Antonio on 9/21?
For the date of Sep 21, the most precipitation ever recorded in San Antonio history is 2.73 inches which happened in 1928.
All-Time Most Precipitation in San Antonio on September 21
Rank Precipitation Year
1 2.73 inches 1928
2 2.45 inches 1967
3 0.75 inches 1912
4 0.67 inches 1958
5 0.58 inches 2020
6 0.53 inches 1971
7 0.50 inches 1964
8 0.48 inches 2003
9 0.31 inches 1995
10 0.26 inches 1969
Weather Station Details
Years Station Coordinates
1947–2024 San Antonio International Airport location
1893–1946 San Antonio Nursery location