1991-2020 Degrees Fahrenheit 1 45.6 44.7 0.9 95 33 1917 2015 1995 1994 top-third 2 46.7 48.1 -1.4 51 77 1901 2015 1995 1994 normal 1970 3 51.3 52.6 -1.3 52 75 1917 1931 1995 1994 normal 1967 4 56.0 57.5 -1.5 39 88 1917 1931 1995 1994 bottom-third 1952,1993 5 60.1 61.7 -1.6 36 91 1917 2007 1995 1994 bottom-third 1952 6 63.2 64.7 -1.5 40 87 1917 1931 1992 1995 bottom-third 1906 7 65.0 66.3 -1.3 44 83 1917,1976 2016 1995 1995 normal 1965,1995 8 65.6 66.6 -1.0 51 76 1917 1998,2015,2016 1995 1995 normal 1949,1978,1995 9 64.8 66.0 -1.2 46 81 1976 2015 1992 1995 normal 1973 10 63.1 64.7 -1.6 38 89 1901,1917 2016 1992 1995 bottom-third 1898,1929 11 61.4 62.9 -1.5 42 85 1901 2016 1993 1995 bottom-third 1899,1988 12 59.5 61.2 -1.7 31 95 1901 2016 1992 1995 bottom-third 1961 18 60.8 62.4 -1.6 31 94 1904 2016,2017 1993 1995 bottom-third 1906,1907,1908,1909,1913,1960 24 59.9 61.2 -1.3 46 78 1902 2017 1994 1995 normal 1908,1930,1960,1994,2014 36 60.0 61.2 -1.2 48 74 1903 2017 1994 1995 normal 1925,1972,1997 48 59.9 61.2 -1.3 38 82 1904 2019 1995 1994 bottom-third 1911,1976,1986 60 59.8 61.1 -1.3 34 84 1905 2019 1986 1995 bottom-third 1921,1973,1976,1986