1991-2020 Degrees Fahrenheit 1 87.7 91.2 -3.5 26 60 1965 2021 1983 1981 bottom-third 2 86.7 86.5 0.2 62 23 1965 2006,2021,2022 1983 1958 top-third 3 80.9 81.9 -1.0 46 38 1965 2021 1983 1981 normal 1946,2019 4 77.3 77.9 -0.6 51 33 1965 2017 1983 1972 normal 1966,1985 5 73.6 74.3 -0.7 55 29 1965 2017 1983 1981 normal 2008 6 70.7 71.3 -0.6 58 25 1944 2014 1983 1981 top-third 1993,2001 7 68.6 69.0 -0.4 57 26 1944 2018 1983 1981 top-third 8 67.6 68.5 -0.9 51 31 1944,1965 2018 1983 1981 normal 1978 9 68.6 69.5 -0.9 51 30 1944 2018 1983 1981 normal 10 70.7 71.4 -0.7 53 28 1942 2018 1983 1981 normal 11 72.5 73.4 -0.9 51 30 1942 2018 1983 1981 normal 2019 12 74.3 75.2 -0.9 49 32 1942 2021 1983 1981 normal 2001 18 72.0 73.9 -1.9 32 47 1965 2018 1983 1982 normal 1955,1958,1961 24 73.0 75.2 -2.2 23 54 1942,1965 2018 1983 1982 bottom-third 1951,1957,1958 36 73.1 75.2 -2.1 25 50 1944 2018,2022 1979 1983 bottom-third 1970 48 73.6 75.2 -1.6 35 38 1944 2018 1983 1981 normal 1961,1987 60 73.5 75.1 -1.6 32 39 1975 2018 1983 1982 normal 1961