1991-2020 Degrees Fahrenheit 1 60.2 67.0 -6.8 19 103 1958 2018 1958 1963 bottom-third 2 60.8 65.7 -4.9 16 101 1958 2023 1958 1963 bottom-third 3 59.7 66.2 -6.5 5 108 1958 2017 1958 1963 bottom-tenth 4 61.5 67.5 -6.0 6 105 1958 2023 1958 1963 bottom-tenth 5 64.0 69.5 -5.5 5 106 1958 2017 1958 1963 bottom-tenth 1955 6 66.8 71.6 -4.8 5 105 1958 2017,2020 1958 1963 bottom-tenth 1951,1955 7 68.9 73.2 -4.3 5 105 1958 2017 1958 1963 bottom-tenth 1951 8 70.6 74.4 -3.8 9 101 1958 2017 1958 1963 bottom-tenth 1978 9 71.6 75.3 -3.7 9 101 1958 2017 1958 1963 bottom-tenth 1914,1956,1969,1978 10 72.1 75.6 -3.5 11 99 1904 2017,2020,2023 1958 1963 bottom-tenth 1924,1956 11 72.0 75.5 -3.5 9 100 1904 2023 1958 1963 bottom-tenth 1910,1941 12 71.8 75.0 -3.2 15 94 1904 2023 1963 1962 bottom-third 1907,1914,1921,1961,1970,1978 18 70.3 73.8 -3.5 8 90 1911 2021 1959 1963 bottom-tenth 1915 24 71.7 74.9 -3.2 6 91 1911 2017 1956 1963 bottom-tenth 1915,1970 36 72.2 74.8 -2.6 11 76 1911,1941 2023 1963 1963 bottom-third 1909,1921,1953,1961,1963,1969,1978,1979 48 72.1 74.8 -2.7 4 75 1911 2023 1961 1963 bottom-tenth 1910,1912,1970 60 72.1 74.8 -2.7 2 72 1911 2023 1962 1963 bottom-tenth 1912,1962