1991-2020 Degrees Fahrenheit 1 56.6 57.3 -0.7 43 42 1976 1965 1943 1942 normal 2 61.7 62.7 -1.0 37 48 1976 2016 1943 1942 normal 1945,1974 3 66.9 68.1 -1.2 32 53 1976 2016 1943 1942 normal 1942,1966,1989 4 71.1 72.3 -1.2 36 49 1976 2016 1943 1941 normal 1987 5 74.0 74.7 -0.7 46 39 1976 2011,2016 1943 1941 normal 6 75.5 75.9 -0.4 54 30 1976 2011 1943 1941 normal 1953,1964 7 75.1 75.7 -0.6 49 35 1976 1998 1943 1941 normal 1965,2002 8 73.9 74.6 -0.7 44 40 1976 2011 1942 1943 normal 9 72.0 72.9 -0.9 45 39 1976 2011 1943 1944 normal 10 70.2 70.9 -0.7 53 31 1940 2011,2016 1943 1944 normal 11 67.9 68.9 -1.0 46 38 1940 2016 1943 1944 normal 1962,1965,2008 12 66.1 67.3 -1.2 38 46 1940 2016 1943 1941 normal 1941,1950,1952 18 69.0 70.2 -1.2 37 46 1968 2016 1943 1943 normal 1943,1952 24 66.1 67.3 -1.2 40 43 1979 2017 1943 1944 normal 1965,1987 36 65.9 67.3 -1.4 27 55 1961 2017,2018 1943 1943 bottom-third 1943,1945,1951,1952,1963,1966,1967,1993,1994 48 65.9 67.2 -1.3 31 50 1961 2018 1943 1944 normal 1951,1967,1989 60 65.4 67.2 -1.8 8 72 1962 2019,2020 1944 1944 bottom-tenth 1963,1981,1984