1901-2000 Degrees Fahrenheit 1 51.5 50.2 1.3 90 39 1907,1927 1934 1951 1949 top-third 1948,2000 2 48.6 45.5 3.1 113 16 1975 1934 1951 1949 top-third 3 39.9 40.1 -0.2 60 69 1899 1910 1951 1949 normal 1971 4 35.4 35.4 0.0 68 61 1899 1992 1951 1946 normal 5 30.7 31.7 -1.0 44 85 1899 1992 1951 1948 normal 1923,1932,1966 6 27.6 29.9 -2.3 21 107 1917 1992 1951 1948 bottom-third 1913,1956,1975 7 27.6 29.8 -2.2 21 107 1899 1992 1951 1948 bottom-third 8 29.1 31.5 -2.4 16 112 1899 1934,2000 1950 1951 bottom-third 1916 9 31.4 34.0 -2.6 11 117 1899 2016 1950 1951 bottom-tenth 1916,1936,1969 10 34.4 37.0 -2.6 9 119 1917 1992,2016 1950 1951 bottom-tenth 1950,1969 11 37.2 39.6 -2.4 10 118 1917 1992,2016 1950 1951 bottom-tenth 1950,1965,1969 12 38.5 41.1 -2.6 7 121 1917 2016 1929 1951 bottom-tenth 18 34.8 37.4 -2.6 6 121 1917 2016 1951 1949 bottom-tenth 24 38.8 41.1 -2.3 5 122 1917 2016 1918 1951 bottom-tenth 1918 36 38.8 41.1 -2.3 2 124 1918 2017 1918 1951 bottom-tenth 48 39.0 41.1 -2.1 1 124 1899,1952 2016 1899 1951 lowest 1899 60 39.4 41.1 -1.7 1 123 1952 2016 1952 1951 lowest