1901-2000 Degrees Fahrenheit 1 29.6 23.9 5.7 121 8 1990 1917 1905 1896 top-tenth 2 30.0 27.8 2.2 101 28 1985 1917 1905 1904 top-third 3 35.1 33.2 1.9 107 22 1985 1917 1905 1904 top-third 1987 4 40.3 38.6 1.7 104 25 1985 1917 1905 1904 top-third 1966,1980,2010 5 45.0 43.6 1.4 103 26 1985 1917 1905 1904 top-third 1966,1967,1987 6 48.8 47.2 1.6 110 19 1985 1917 1905 1901 top-third 2015 7 49.4 48.5 0.9 88 41 1985 2021 1905 1904 top-third 1922,1962,1963 8 49.3 48.6 0.7 85 44 1916 2021 1905 1904 normal 1926,1953,1973,1974 9 48.6 47.8 0.8 92 37 1916 2021 1905 1904 top-third 1962,1979,1981,2022 10 46.6 46.3 0.3 73 56 1985 1934 1905 1904 normal 1915,1918,1946,1962,1973,1980,2019 11 44.8 44.5 0.3 72 57 1985 1934 1905 1904 normal 1901,1907,1962,1973,2002 12 43.0 42.6 0.4 74 55 1985 1934 1905 1904 normal 1974,1977,2002,2019 18 44.0 44.1 -0.1 52 76 1985 1934 1903 1905 normal 1937 24 42.6 42.6 0.0 54 74 1985 2015,2016 1904 1905 normal 1902,1942,1946,1970,1977,1994 36 42.8 42.6 0.2 63 64 1913 2016 1905 1902 normal 1938,1947,1961,1962,1983,1987,2011 48 42.4 42.6 -0.2 42 84 1985 2017 1905 1904 bottom-third 1900,1904,1929,1944,1948,1953,1955,1956,1974 60 42.3 42.6 -0.3 27 98 1913,1916 2016,2018 1905 1905 bottom-third 1903,1905,1921,1925,1948,1949,1950,1953,1956,1959,1972,1976,1978