Washington D.C. September 18 Weather Records

Daily averages and all-time records for weather in Washington D.C., District of Columbia for the date of September 18.
September 18 All-Time Records
1851–2023
Highest temperature 91 °F 1927
Lowest temperature 45 °F 1937
Lowest daily high 56 °F 1875
Highest daily low 73 °F 2018
Most precipitation 2.3 inches 2003
Most snow none -
September 18 Average Weather
1991–2020 1
Average high 79.4 °F
Average low 62.7 °F
Chance precipitation 29.2%
Chance snow 0%
Washington D.C. September 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 84 63 0.00 0.0
2021 85 70 0.00 0.0
2020 76 59 0.07 0.0
2019 80 63 0.00 0.0
2018 84 73 0.22 0.0
2017 77 70 0.00 0.0
2016 89 71 0.00 0.0
2015 87 65 0.00 0.0
2014 81 64 0.00 0.0
2013 74 52 0.00 0.0
2012 80 66 0.93 0.0
2011 68 55 0.00 0.0
2010 79 58 0.00 0.0
2009 78 64 0.00 0.0
2008 83 61 0.00 0.0
2007 74 55 0.00 0.0
2006 82 64 0.00 0.0
2005 86 68 0.00 0.0
2004 74 59 0.43 0.0
2003 77 66 2.28 0.0
2002 84 65 0.00 0.0
2001 80 57 0.00 0.0
2000 72 55 0.00 0.0
1999 73 54 0.00 0.0
1998 81 70 0.00 0.0
1997 83 65 0.23 0.0
1996 73 60 0.00 0.0
1995 73 63 0.00 0.0
1994 77 61 0.08 0.0
1993 75 64 0.18 0.0
1992 86 66 0.00 0.0
1991 90 73 0.15 0.0
1990 67 46 0.00 0.0
1989 75 60 0.00 0.0
1988 80 64 0.00 0.0
1987 86 69 0.01 0.0
1986 73 50 0.00 0.0
1985 78 56 0.00 0.0
1984 72 52 0.00 0.0
1983 82 60 0.00 0.0
1982 88 59 0.00 0.0
1981 68 63 0.04 0.0
1980 83 71 0.02 0.0
1979 80 60 0.00 0.0
1978 90 72 0.00 0.0
1977 89 67 0.00 0.0
1976 81 62 0.00 0.0
1975 71 64 0.70 0.0
1974 82 63 0.00 0.0
1973 79 57 0.00 0.0
1972 83 69 0.10 0.0
1971 81 67 0.00 0.0
1970 90 73 0.10 0.0
1969 73 59 0.00 0.0
1968 80 63 0.00 0.0
1967 86 61 0.00 0.0
1966 76 52 0.00 0.0
1965 89 70 0.00 0.0
1964 79 67 0.00 0.0
1963 76 63 0.00 0.0
1962 75 58 0.00 0.0
1961 67 55 0.01 0.0
1960 75 65 0.25 0.0
1959 68 49 0.00 0.0
1958 78 66 0.00 0.0
1957 74 65 0.00 0.0
1956 69 55 0.00 0.0
1955 80 69 0.00 0.0
1954 80 64 0.00 0.0
1953 75 54 0.00 0.0
1952 86 66 0.00 0.0
1951 75 62 0.00 0.0
1950 74 55 0.00 0.0
1949 85 62 0.31 0.0
1948 89 65 0.00 0.0
1947 81 59 0.00 0.0
1946 83 60 0.00 0.0
1945 79 60 1.25 0.0
1944 73 67 0.36 0.0
1943 68 47 0.00 0.0
1942 88 73 0.21 0.0
1941 82 64 0.00 0.0
1940 81 55 0.00 0.0
1939 67 51 0.00 0.0
1938 69 58 0.04 0.0
1937 68 45 0.00 0.0
1936 73 66 0.00 0.0
1935 76 57 0.00 0.0
1934 68 54 0.00 0.0
1933 81 64 0.00 0.0
1932 79 51 0.00 0.0
1931 80 67 0.00 0.0
1930 78 61 0.00 0.0
1929 67 52 0.00 0.0
1928 69 57 0.16 0.0
1927 91 70 0.00 0.0
1926 70 64 0.00 0.0
1925 89 58 0.00 0.0
1924 76 51 0.00 0.0
1923 73 48 0.00 0.0
1922 70 51 0.00 0.0
1921 91 66 0.00 0.0
1920 80 50 0.00 0.0
1919 74 54 0.00 0.0
1918 69 58 1.01 0.0
1917 77 49 0.00 0.0
1916 78 50 0.18 0.0
1915 84 70 0.18 0.0
1914 85 56 0.00 0.0
1913 73 63 0.00 0.0
1912 80 68 0.41 0.0
1911 71 58 0.00 0.0
1910 82 48 0.00 0.0
1909 77 56 0.00 0.0
1908 83 50 0.00 0.0
1907 75 65 0.03 0.0
1906 85 69 0.01 0.0
1905 85 70 0.03 0.0
1904 85 55 0.00 0.0
1903 66 50 0.00 0.0
1902 71 51 0.00 0.0
1901 62 57 0.01 0.0
1900 71 56 0.00 0.0
1899 78 51 0.00 0.0
1898 91 67 0.00 0.0
1897 71 49 0.00 0.0
1896 83 66 0.01 0.0
1895 84 66 0.29 0.0
1894 74 68 0.06 0.0
1893 78 48 0.00 0.0
1892 80 54 0.00 0.0
1891 90 64 0.00 0.0
1890 75 55 0.00 0.0
1889 64 54 0.45 0.0
1888 80 64 0.07 0.0
1887 70 52 0.00 0.0
1886 78 66 0.00 0.0
1885 81 56 0.00 0.0
1884 74 61 0.00 0.0
1883 69 59 0.03 n/a
1882 84 64 0.02 n/a
1881 76 60 0.00 n/a
1880 88 61 0.00 n/a
1879 77 49 0.00 n/a
1878 85 59 0.00 n/a
1877 70 58 0.00 n/a
1876 76 60 0.00 n/a
1875 56 46 0.45 n/a
1874 82 62 0.00 n/a
1873 77 62 0.00 n/a
1872 78 54 0.00 n/a
1851 72 47 n/a n/a
All-Time Highest Temperatures in Washington D.C. on September 18
Rank Temperature Year
1 91 °F 1921
1 91 °F 1927
1 91 °F 1898
4 90 °F 1891
4 90 °F 1978
4 90 °F 1991
4 90 °F 1970
8 89 °F 2016
8 89 °F 1925
8 89 °F 1948
8 89 °F 1977
8 89 °F 1965
All-Time Lowest Temperatures in Washington D.C. on September 18
Rank Temperature Year
1 45 °F 1937
2 46 °F 1990
2 46 °F 1875
4 47 °F 1943
4 47 °F 1851
6 48 °F 1893
6 48 °F 1923
6 48 °F 1910
9 49 °F 1897
9 49 °F 1917
9 49 °F 1959
9 49 °F 1879
Lowest High Temperatures in Washington D.C. on September 18
Rank Temperature Year
1 56 °F 1875
2 62 °F 1901
3 64 °F 1889
4 66 °F 1903
5 67 °F 1961
5 67 °F 1939
5 67 °F 1929
5 67 °F 1990
9 68 °F 1981
9 68 °F 1934
9 68 °F 1937
9 68 °F 1959
9 68 °F 1943
9 68 °F 2011
All-Time Most Precipitation in Washington D.C. on September 18
Rank Precipitation Year
1 2.3 inches 2003
2 1.3 inches 1945
3 1.0 inches 1918
4 0.9 inches 2012
5 0.7 inches 1975
6 0.5 inches 1889
6 0.5 inches 1875
8 0.4 inches 2004
9 0.4 inches 1912
10 0.4 inches 1944
Weather Station Details
Years Station Coordinates
1945–2023 Washington Reagan Airport location
1851–1945 Washington D.C. location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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