1991-2020 Degrees Fahrenheit 1 27.8 29.3 -1.5 75 55 1934 2018 1974 1970 normal 2 29.2 28.2 1.0 104 26 1904 2023 1974 1960 top-third 1989,2013 3 30.7 29.8 0.9 104 25 1918 2016 1974 1954 top-third 4 33.3 33.0 0.3 100 28 1918 2012,2016,2023 1974 1954 top-third 5 36.1 36.9 -0.8 82 46 1905,1918 2023 1973 1974 normal 6 40.3 41.4 -1.1 83 45 1918 2012,2016 1973 1974 normal 1909,1942,1955,1986 7 44.7 45.7 -1.0 85 43 1905 2023 1973 1974 normal 1958 8 47.9 49.0 -1.1 84 44 1905 2023 1973 1974 normal 1952,1967 9 49.6 50.9 -1.3 80 48 1904 2023 1973 1974 normal 1937,1988,1996 10 50.0 51.5 -1.5 68 60 1918 2023 1973 1974 normal 11 49.9 51.1 -1.2 79 49 1918 2023 1973 1974 normal 1939,1990 12 48.7 49.8 -1.1 79 49 1918 2023 1973 1974 normal 1913,1946,1996 18 46.1 47.0 -0.9 89 37 1905 2017 1973 1974 top-third 1951 24 49.4 49.8 -0.4 99 27 1918 2023 1974 1954 top-third 1933 36 48.6 49.7 -1.1 79 45 1918 2023 1974 1974 normal 1960,1974,1980,1982,1988 48 48.7 49.7 -1.0 79 43 1920 2023 1974 1956 normal 1976,1984,1990 60 48.5 49.6 -1.1 71 49 1908 2023 1974 1958 normal 1947