1991-2020 Degrees Fahrenheit 1 61.2 57.8 3.4 74 8 1967 1977 1971 1972 top-tenth 2 50.5 51.5 -1.0 36 46 1947 1977 1971 1970 normal 1944,1946,1984 3 41.7 45.0 -3.3 18 64 1950 2012 1971 1970 bottom-third 4 34.5 38.9 -4.4 11 71 1950 2012 1967 1971 bottom-third 5 29.1 34.4 -5.3 5 76 2014 2012 1971 1971 bottom-tenth 1963,1971 6 27.8 32.5 -4.7 12 69 2014 2012 1971 1970 bottom-third 7 28.7 32.8 -4.1 11 68 2014 2012 1971 1970 bottom-third 8 32.0 34.7 -2.7 21 58 2014 2012 1971 1969 bottom-third 1982 9 35.2 37.7 -2.5 21 58 1943 2016 1971 1969 bottom-third 1960,1993,2019 10 38.3 40.9 -2.6 18 61 1943 2012 1971 1970 bottom-third 1970,1982 11 40.9 43.6 -2.7 13 66 1943 2012 1967 1971 bottom-third 1967,1978 12 43.3 45.6 -2.3 19 60 1943 2012 1971 1969 bottom-third 1982 18 38.1 41.2 -3.1 7 71 1951 1999 1966 1971 bottom-tenth 24 43.3 45.6 -2.3 13 63 1952,1979 2017 1971 1970 bottom-third 1947,1968,1970,1978 36 43.0 45.6 -2.6 5 69 1979 2000 1967 1971 bottom-tenth 48 43.3 45.6 -2.3 4 68 1968 2001,2002 1971 1971 bottom-tenth 1970,1971,1979 60 43.3 45.6 -2.3 2 68 1969 2002 1971 1971 bottom-tenth 1947,1963,1967,1970,1971,1973,1979