1901-2000 Degrees Fahrenheit 1 48.6 50.6 -2.0 28 102 1907 1896 1975 1978 bottom-third 2 44.9 45.1 -0.2 59 71 1926 2012 1978 1977 normal 1895,1949 3 35.8 39.9 -4.1 7 123 1978 2012 1978 1977 bottom-tenth 1960 4 31.1 36.5 -5.4 3 127 1978 2012 1978 1977 bottom-tenth 5 31.2 35.3 -4.1 6 123 1978 2012 1978 1977 bottom-tenth 6 33.3 36.3 -3.0 10 119 1904 2012 1978 1976 bottom-tenth 1940,1982 7 35.9 38.8 -2.9 9 120 1978 2012 1978 1976 bottom-tenth 1899,1982 8 40.0 42.2 -2.2 12 117 1904,1918 2017 1978 1976 bottom-tenth 1899,1902,1905,1996 9 43.6 45.5 -1.9 12 117 1904,1918 2017 1978 1976 bottom-tenth 1926 10 46.6 48.4 -1.8 14 115 1918 2017 1978 1976 bottom-third 1926 11 48.8 50.4 -1.6 13 116 1904 2017 1978 1976 bottom-tenth 2015 12 49.7 51.3 -1.6 10 119 1918 2017 1978 1976 bottom-tenth 1912,1926,1951,2014 18 43.5 46.3 -2.8 3 125 1905 2017 1918 1978 bottom-tenth 24 49.5 51.3 -1.8 4 124 1978 2017 1978 1977 bottom-tenth 36 49.0 51.3 -2.3 1 126 1979 2018 1979 1978 lowest 48 50.1 51.3 -1.2 3 123 1980 2019 1918 1978 bottom-tenth 1906,1907,1918 60 50.2 51.3 -1.1 5 120 1981 2020 1908 1978 bottom-tenth 1906