1901-2000 Degrees Fahrenheit 1 39.3 41.6 -2.3 41 89 1960 2012 1895 1895 bottom-third 1940,1954 2 29.2 36.6 -7.4 5 125 1978 2012 1895 1895 bottom-tenth 3 26.5 33.6 -7.1 4 126 1978 2012 1895 1895 bottom-tenth 4 -99 33.1 -99 -99 -99 1978 2012 normal 5 -99 34.9 -99 -99 -99 1978 2012 normal 6 -99 38.4 -99 -99 -99 1978 2012 normal 7 -99 42.6 -99 -99 -99 1977 2012 normal 8 -99 46.5 -99 -99 -99 1977 2012,2017 normal 9 -99 49.8 -99 -99 -99 1977 2012 normal 10 -99 52.1 -99 -99 -99 1977 2012 normal 11 -99 53.1 -99 -99 -99 1977 2012 normal 12 -99 53.1 -99 -99 -99 1918 2012 normal 18 -99 48.2 -99 -99 -99 1905,1979 2017 normal 24 -99 53.1 -99 -99 -99 1905,1978 2017 normal 36 -99 53.0 -99 -99 -99 1979 2018 normal 48 -99 53.0 -99 -99 -99 1980 2019 normal 60 -99 53.0 -99 -99 -99 1981 2020 normal