1991-2020 Degrees Fahrenheit 1 52.8 55.8 -3.0 30 62 1940 1950 1966 1967 bottom-third 2 54.2 56.7 -2.5 28 64 1984 2022 1966 1967 bottom-third 1991 3 57.5 59.2 -1.7 38 54 1977 2017 1964 1967 normal 1969 4 60.8 62.8 -2.0 30 57 1977 2017 1964 1967 normal 1987 5 64.2 66.6 -2.4 19 68 1977 2017 1962 1967 bottom-third 1960,1976,1988,2010 6 67.0 69.9 -2.9 7 80 1977 2017 1962 1967 bottom-tenth 1931,1961 7 69.2 72.1 -2.9 5 81 1977 2017 1962 1967 bottom-tenth 1962 8 70.9 73.6 -2.7 6 80 1977 2017 1962 1967 bottom-tenth 9 71.5 74.1 -2.6 7 79 1977 2017 1962 1967 bottom-tenth 1936 10 71.9 73.8 -1.9 15 70 1977 2017 1967 1966 bottom-third 1948,1960,1979 11 71.5 73.1 -1.6 31 54 1977 2017 1967 1966 normal 12 70.1 72.0 -1.9 24 60 1977 2017 1967 1966 bottom-third 1971,1988 18 69.3 71.3 -2.0 24 58 1977 2017,2018 1967 1966 bottom-third 24 69.7 71.9 -2.2 15 64 1977 2018 1962 1967 bottom-third 1949,1960 36 69.9 72.0 -2.1 16 59 1979 2018,2019 1967 1966 bottom-third 1937,1982 48 69.9 71.9 -2.0 15 56 1980 2020 1964 1967 bottom-third 1972 60 70.0 71.9 -1.9 19 49 1980,1981 2021 1965 1967 bottom-third 1961