1991-2020 Degrees Fahrenheit 1 48.3 50.3 -2.0 27 49 1976 1985 1949 1948 normal 1953 2 56.5 55.9 0.6 54 22 1976 2016 1948 1949 top-third 1982,1984 3 60.7 61.7 -1.0 30 46 1976 2016 1948 1948 normal 1948,1975 4 65.0 66.2 -1.2 26 50 1976 2016 1949 1948 normal 5 68.5 69.1 -0.6 34 42 1976 2016 1949 1948 normal 1962,1970 6 70.0 70.4 -0.4 39 37 1976 2016 1949 1948 normal 1965 7 70.1 70.2 -0.1 42 34 1976 2016 1949 1948 normal 1990 8 68.6 69.0 -0.4 32 44 1976 2016 1949 1948 normal 1958,1960,1980,1990 9 66.5 67.1 -0.6 36 40 1976 2016 1949 1948 normal 1978,2001 10 64.3 64.7 -0.4 41 35 1976,1979 2016 1949 1948 normal 1962 11 62.7 62.4 0.3 58 18 1979 2016 1948 1949 top-third 1991 12 61.1 60.8 0.3 57 17 1979 2016 1949 1949 top-third 1991,2002 18 64.3 64.0 0.3 56 18 1977 2017 1949 1949 top-third 1991,2005 24 -99 60.8 -99 -99 -99 1979 2017 normal 36 -99 60.8 -99 -99 -99 1979,1980 2018 normal 48 -99 60.8 -99 -99 -99 1979 2019 normal 60 -99 60.8 -99 -99 -99 1979,1980,1982 2020 normal