1991-2020 Degrees Fahrenheit 1 27.6 29.0 -1.4 70 60 1937 1986 1997 2000 normal 2 26.4 28.6 -2.2 43 86 1979 1934,1981 1993 2000 bottom-third 1932,1938,1980 3 26.2 31.0 -4.8 10 118 1979 1934 1984 2000 bottom-tenth 4 31.2 34.8 -3.6 13 115 1917 1934 1985 2000 bottom-tenth 5 36.6 39.7 -3.1 19 109 1962 1934 1986 2000 bottom-third 1986 6 42.3 44.4 -2.1 32 96 1917 2022 1994 2000 bottom-third 1898,1977 7 46.5 48.0 -1.5 55 73 1917 2022 1994 2000 normal 1974,1975,1980 8 48.5 49.9 -1.4 71 57 1916,1917 2022 1994 2000 normal 1922,1931,1969,1974 9 49.3 50.1 -0.8 81 47 1916 2022 1998 2000 normal 1923 10 48.9 49.3 -0.4 89 39 1917 2022 1998 2000 top-third 11 47.8 48.2 -0.4 95 33 1913 2013 1998 2000 top-third 12 46.7 46.6 0.1 104 24 1913 2018 1999 2000 top-third 1934,1999 18 46.4 45.9 0.5 112 14 1918 1935,2018 1999 2000 top-third 1955,2003 24 47.0 46.6 0.4 110 16 1914 2018 2000 1935 top-third 36 46.9 46.6 0.3 107 17 1918 2018 2000 2001 top-third 2014 48 46.5 46.6 -0.1 103 19 1916 2019 2000 2001 top-third 60 46.3 46.5 -0.2 100 20 1917 2019 2000 2001 top-third 2014