1901-2000 Degrees Fahrenheit 1 55.4 60.7 -5.3 3 126 1977 2001 1933 1932 bottom-tenth 1953 2 54.1 57.4 -3.3 7 122 1967 1992 1917 1932 bottom-tenth 1953 3 52.3 54.5 -2.2 12 117 1917 1934 1922 1932 bottom-tenth 1964,2010 4 49.2 52.2 -3.0 2 127 1917 1934 1917 1932 bottom-tenth 1948 5 47.0 50.2 -3.2 2 127 1917 2015 1922 1932 bottom-tenth 1922 6 45.6 49.1 -3.5 2 126 1917 2015 1917 1932 bottom-tenth 7 46.7 49.1 -2.4 3 125 1917 2015 1917 1932 bottom-tenth 8 48.3 50.4 -2.1 3 125 1917 2015 1917 1932 bottom-tenth 9 50.8 52.4 -1.6 6 122 1917 2015 1932 1932 bottom-tenth 1921,1932,1955 10 53.0 54.6 -1.6 7 121 1917 2015 1917 1932 bottom-tenth 11 54.9 56.4 -1.5 7 121 1917 2015 1917 1932 bottom-tenth 1948 12 56.1 57.4 -1.3 9 119 1917 2015 1921 1932 bottom-tenth 1942 18 53.3 54.6 -1.3 6 121 1917 2015 1917 1932 bottom-tenth 24 56.4 57.4 -1.0 10 117 1913,1917 2015 1922 1932 bottom-tenth 1903 36 56.9 57.4 -0.5 24 102 1913,1917 2016 1924 1932 bottom-third 1900,1905,1951,1966,1973,1975 48 57.2 57.4 -0.2 45 80 1913 2016,2017,2018 1925 1932 normal 1907,1946,1973 60 57.0 57.3 -0.3 33 91 1913,1917 2018 1925 1932 bottom-third 1908,1946,1957,1975,1976,1977