1901-2000 Degrees Fahrenheit 1 29.8 27.2 2.6 98 32 1918 2023 1971 1967 top-third 1919,1974 2 32.0 29.1 2.9 94 35 1918 2016 1971 1967 top-third 1947,1992 3 34.5 33.2 1.3 82 47 1918 2016 1971 1967 normal 1906 4 40.2 37.9 2.3 99 30 1918 2016 1971 1958 top-third 5 45.3 42.7 2.6 108 21 1918 2016 1971 1950 top-third 6 49.5 47.0 2.5 109 20 1918 2016 1971 1950 top-third 7 52.6 50.4 2.2 108 21 1905,1918 2016 1971 1950 top-third 8 54.3 52.2 2.1 108 21 1904 2023 1971 1950 top-third 2018 9 54.3 52.6 1.7 103 26 1918 2016,2023 1971 1958 top-third 1953,1958,2014 10 53.3 51.9 1.4 98 31 1918 2023 1971 1960 top-third 1949,2010 11 51.6 50.5 1.1 93 36 1918 2023 1971 1960 top-third 1978,1986,2003,2005 12 49.8 48.6 1.2 95 34 1918 2023 1971 1958 top-third 1986,2005 18 48.8 48.0 0.8 83 45 1905 2013,2017 1971 1958 normal 1976 24 49.2 48.5 0.7 80 48 1918 2023 1971 1956 normal 1952,1976,1983,1990,1997 36 48.9 48.5 0.4 68 59 1906 2023 1971 1962 normal 1948,1962,1978 48 48.8 48.5 0.3 62 64 1908 2023 1971 1961 normal 1948,1961,1980 60 48.4 48.5 -0.1 50 75 1908 2023 1971 1964 normal 1964