1901-2000 Degrees Fahrenheit 1 30.2 29.4 0.8 68 62 1978 2017 1895 1896 normal 1928,1950,2013 2 28.9 28.0 0.9 72 58 1978 2017 1895 1896 normal 1960,1997 3 30.1 28.8 1.3 81 48 1978 1932 1896 1896 normal 1922,1941,1973 4 32.4 31.9 0.5 62 67 1977 1932 1896 1896 normal 1938,1952,1955 5 35.2 36.3 -1.1 30 99 1977 1932 1896 1896 bottom-third 1958 6 40.8 41.2 -0.4 41 88 1977 1932 1896 1896 bottom-third 1930,1948,1969,1997 7 45.6 45.6 0.0 54 75 1977 1932 1896 1896 normal 1924,1938 8 48.9 49.3 -0.4 43 86 1977 1932 1896 1896 bottom-third 1965,1973 9 51.7 51.6 0.1 67 62 1977 1932 1896 1896 normal 1943,1990,2003 10 52.8 52.6 0.2 62 67 1918,1977 1932 1896 1896 normal 1897,1903,1941,1943,1971 11 52.8 52.4 0.4 67 62 1918 1932 1896 1896 normal 1971 12 51.5 51.3 0.2 66 63 1918 2017 1896 1896 normal 1928,1975 18 -99 47.9 -99 -99 -99 1905 2017 normal 24 -99 51.3 -99 -99 -99 1905,1918 2017 normal 36 -99 51.3 -99 -99 -99 1979 2013,2018 normal 48 -99 51.3 -99 -99 -99 1980 2019 normal 60 -99 51.3 -99 -99 -99 1981 2020 normal