1901-2000 Degrees Fahrenheit 1 25.0 31.5 -6.5 19 111 1978 2017 1902 1903 bottom-third 1947 2 23.1 29.6 -6.5 13 117 1979 2017 1895 1903 bottom-tenth 3 23.6 30.3 -6.7 6 123 1978 1932 1904 1903 bottom-tenth 4 27.2 33.3 -6.1 3 126 1977 1932 1904 1903 bottom-tenth 1918 5 32.6 37.8 -5.2 4 125 1977 1932 1904 1903 bottom-tenth 6 38.2 42.7 -4.5 4 125 1977 1932 1904 1903 bottom-tenth 7 43.2 47.2 -4.0 4 125 1977 1932 1904 1903 bottom-tenth 8 47.3 50.9 -3.6 3 126 1977 1932 1904 1903 bottom-tenth 9 49.5 53.3 -3.8 3 126 1977 1932 1904 1903 bottom-tenth 10 51.1 54.3 -3.2 3 126 1977 1932 1904 1903 bottom-tenth 11 51.2 54.1 -2.9 4 125 1918 1932 1904 1903 bottom-tenth 12 50.8 53.1 -2.3 5 124 1918 2017 1904 1903 bottom-tenth 1951,2014 18 48.1 49.6 -1.5 9 119 1905 2017 1904 1903 bottom-tenth 1959 24 51.9 53.1 -1.2 13 115 1905 2013,2017 1904 1903 bottom-tenth 1968 36 51.7 53.0 -1.3 6 121 1979 2013 1904 1903 bottom-tenth 1980 48 52.2 53.0 -0.8 14 112 1980 2019 1904 1903 bottom-third 1913,1920,1964 60 52.4 53.0 -0.6 15 110 1981 2020 1903 1903 bottom-third 1903,1909,1912,1918,1919,1921,1962,1972