1901-2000 Degrees Fahrenheit 1 44.6 42.7 1.9 84 46 1960 1921 1972 1973 normal 1918,2006 2 39.2 38.6 0.6 67 63 1934 2012 1972 1973 normal 1984,1989 3 38.9 36.8 2.1 98 32 1940 2012 1973 1954 top-third 1954,1995 4 39.0 36.7 2.3 98 31 1904 2012 1972 1973 top-third 1919,1975,1992 5 40.7 38.5 2.2 103 26 1904 2012 1973 1953 top-third 6 43.6 41.5 2.1 103 26 1918 2012 1973 1972 top-third 1972 7 47.2 45.2 2.0 105 24 1918 2012 1973 1972 top-third 1995 8 50.8 48.8 2.0 108 21 1918 2012 1973 1949 top-third 1913,2013,2018 9 53.6 51.7 1.9 106 23 1918 2012 1973 1950 top-third 1976 10 55.6 53.6 2.0 108 21 1904 2012 1973 1950 top-third 1995 11 56.0 54.4 1.6 106 23 1918 2012 1973 1950 top-third 1949 12 55.7 54.2 1.5 105 24 1918 2012 1973 1950 top-third 18 51.2 49.9 1.3 98 30 1905 2017 1973 1954 top-third 1953 24 54.8 54.2 0.6 83 45 1905 2017 1973 1972 normal 1946,1949,1951,1972,1989 36 54.9 54.2 0.7 86 41 1906 2013,2018,2021,2022 1973 1956 top-third 1956,1986,1996 48 54.8 54.2 0.6 81 45 1905 2020,2023 1973 1956 normal 1932,1935,1951,1954,1975 60 54.5 54.2 0.3 70 55 1908 2020 1973 1958 normal 1932,1947,1977