1991-2020 Degrees Fahrenheit 1 57.0 59.7 -2.7 32 56 1939 2016 1969 1972 normal 2 54.1 58.1 -4.0 13 73 1949 2014,2015 1966 1972 bottom-third 3 53.1 57.2 -4.1 10 76 1949 2015 1966 1972 bottom-third 1944 4 54.0 59.1 -5.1 3 82 1949 2018 1949 1972 bottom-tenth 5 57.5 62.7 -5.2 3 81 1949 2018 1949 1972 bottom-tenth 6 62.1 67.0 -4.9 3 81 1949 2018 1949 1972 bottom-tenth 7 66.1 70.8 -4.7 2 82 1942 2018 1949 1972 bottom-tenth 1949 8 69.7 73.9 -4.2 4 80 1942 2021 1949 1972 bottom-tenth 9 71.8 75.8 -4.0 5 79 1942 2018,2021 1972 1972 bottom-tenth 1966,1972,1985 10 72.5 76.4 -3.9 7 76 1942 2021 1972 1971 bottom-tenth 1952 11 72.5 76.0 -3.5 9 73 1942 2021 1972 1971 bottom-third 12 72.3 75.2 -2.9 22 60 1942 2018 1972 1970 bottom-third 1985 18 69.2 72.5 -3.3 11 69 1945 2018 1972 1971 bottom-third 24 71.7 75.2 -3.5 8 70 1943 2018 1972 1971 bottom-tenth 36 71.8 75.2 -3.4 7 69 1944 2018 1967 1972 bottom-tenth 48 72.1 75.2 -3.1 11 63 1945 2018 1972 1971 bottom-third 1954,1956,1976,1977 60 72.0 75.1 -3.1 7 65 1966 2018 1969 1972 bottom-tenth 1967,1968,1974