1991-2020 Degrees Fahrenheit 1 68.3 67.4 0.9 58 24 1969 2005 1962 1959 top-third 2 61.2 62.6 -1.4 32 50 1947 2018 1961 1962 normal 1948 3 56.3 56.8 -0.5 49 33 1947 1987 1962 1962 normal 1962,2014 4 49.9 50.6 -0.7 48 34 1947 2012 1962 1959 normal 1952,1964,2018 5 42.0 44.6 -2.6 24 58 1947 2012 1960 1962 bottom-third 2003,2013 6 35.6 39.9 -4.3 8 73 1979 2012 1950 1962 bottom-tenth 1982 7 33.2 37.5 -4.3 9 72 1979 2012 1959 1962 bottom-third 1959,1996 8 33.5 37.1 -3.6 10 69 1979 2012 1959 1962 bottom-third 1947,1971 9 35.3 38.4 -3.1 11 68 1979 2012 1960 1962 bottom-third 1959,1960,1970 10 37.4 40.7 -3.3 8 71 1943,1979 2012,2016 1956 1962 bottom-tenth 1982 11 40.2 43.3 -3.1 9 70 1943 2012 1956 1962 bottom-third 1967 12 42.4 45.6 -3.2 6 73 1943,1951,1979 2012 1951 1962 bottom-tenth 1993 18 40.6 43.7 -3.1 4 74 1951 1999 1952 1962 bottom-tenth 1952 24 42.9 45.6 -2.7 5 71 1952,1979 2017 1952 1962 bottom-tenth 36 43.4 45.6 -2.2 10 64 1979 2000 1953 1962 bottom-third 1947,1965,1970,1971,1973 48 43.5 45.6 -2.1 14 58 1968,1980 2001,2002 1960 1962 bottom-third 1960,1981,1996 60 43.4 45.6 -2.2 8 62 1969 2002 1947 1962 bottom-third 1966,1973,1979,1981