1991-2020 Degrees Fahrenheit 1 81.1 82.3 -1.2 80 49 1903 2022 1895 1896 normal 2 78.8 79.3 -0.5 100 29 1903 2022 1895 1896 top-third 1939,1953,2016,2021 3 75.2 75.9 -0.7 89 40 1903 2022 1895 1896 top-third 1934,1965 4 70.9 72.6 -1.7 70 59 1903 2022 1895 1896 normal 1910,1943,1978 5 67.5 69.3 -1.8 66 63 1903 2017 1895 1896 normal 1921 6 64.8 66.4 -1.6 71 58 1903 2017 1895 1896 normal 1904,1935,1957 7 62.8 64.5 -1.7 66 62 1903 2017 1896 1896 normal 1945,1976 8 61.9 64.0 -2.1 50 78 1912 2017 1896 1896 normal 1948,1965,1997 9 62.4 64.8 -2.4 40 88 1977 2017 1896 1896 bottom-third 1981,1993 10 64.1 66.3 -2.2 44 84 1977 2017 1896 1896 normal 1993 11 65.7 68.0 -2.3 42 86 1977 2017 1896 1896 bottom-third 1951 12 67.1 69.3 -2.2 41 87 1977 2017 1896 1896 bottom-third 1949,1951,1993 18 65.2 68.3 -3.1 19 109 1904,1913 2017 1896 1896 bottom-third 1941 24 -99 69.3 -99 -99 -99 1978 2017,2018 normal 36 -99 69.3 -99 -99 -99 1905 2018 normal 48 -99 69.2 -99 -99 -99 1915 2020 normal 60 -99 69.1 -99 -99 -99 1979 2020 normal