1901-2000 Degrees Fahrenheit 1 35.5 36.2 -0.7 40 89 1989 2015 1963 1965 bottom-third 1953 2 40.9 40.8 0.1 58 71 1917 2015 1963 1965 normal 1895,1961,1972,1977 3 44.8 46.2 -1.4 29 100 1917 1931 1963 1965 bottom-third 1980,2010 4 50.0 51.8 -1.8 13 116 1976 1931 1963 1965 bottom-tenth 1963,1967 5 54.5 56.4 -1.9 9 120 1976 1931 1950 1965 bottom-tenth 2000 6 58.4 59.7 -1.3 15 114 1976 1931 1963 1965 bottom-third 1958 7 60.2 61.5 -1.3 15 114 1976 1931 1963 1965 bottom-third 1997 8 60.4 61.9 -1.5 12 117 1976 1931 1963 1965 bottom-tenth 9 59.6 61.1 -1.5 9 120 1976 1931 1961 1965 bottom-tenth 1903,1961 10 58.3 59.6 -1.3 10 119 1917 1921 1960 1965 bottom-tenth 1992 11 56.2 57.5 -1.3 14 115 1917 1921 1963 1965 bottom-third 1968,1978 12 53.8 55.5 -1.7 9 120 1917 1921 1963 1965 bottom-tenth 1912 18 55.8 56.9 -1.1 14 114 1977 2016 1963 1965 bottom-third 1960 24 54.7 55.5 -0.8 23 105 1979 1922 1964 1965 bottom-third 1951,1960,2014 36 55.0 55.5 -0.5 28 99 1978,1980 2018 1965 1959 bottom-third 1926,1959 48 54.7 55.5 -0.8 15 111 1979 2019 1964 1965 bottom-third 1904,1917,1918 60 54.7 55.5 -0.8 16 109 1980 2020 1964 1965 bottom-third 1905,1968