1901-2000 Degrees Fahrenheit 1 25.7 22.0 3.7 96 34 1949 1953 1997 1999 top-third 1899,1939,1986 2 25.8 23.0 2.8 102 27 1949 1934 1999 1994 top-third 2012 3 30.1 25.9 4.2 123 6 1949 1934 1999 1981 top-tenth 1940 4 34.2 30.5 3.7 125 4 1949 1934 1999 1934 top-tenth 5 38.2 35.3 2.9 122 7 1949 1918 1999 1954 top-tenth 1940 6 42.7 40.0 2.7 124 5 1949 1918,1934 1999 1959 top-tenth 1954,1959 7 45.7 43.6 2.1 114 15 1949 1918,1934 1998 1999 top-third 2013 8 46.9 45.2 1.7 109 20 1917,1949 2022 1998 1999 top-third 1935,1953 9 46.9 45.7 1.2 101 28 1917 2022 1997 1999 top-third 1905,1911,1989,1990 10 46.1 45.2 0.9 93 36 1917 2022 1998 1999 top-third 1926,1939,1998,2020,2023 11 45.0 44.1 0.9 94 35 1949 1935 1997 1999 top-third 1926,1953,1978,1981 12 43.5 42.6 0.9 87 42 1949 1935 1997 1999 top-third 1939 18 43.1 41.7 1.4 106 22 1986 1935 1998 1999 top-third 1919,1989 24 43.9 42.6 1.3 105 23 1986 2016 1999 1999 top-third 1999 36 43.8 42.6 1.2 108 19 1914,1986 2017,2018 1999 1990 top-third 2001,2002,2014,2021 48 43.6 42.6 1.0 103 23 1986 2018 1999 1999 top-third 1993,1998,1999,2010,2014 60 43.6 42.6 1.0 102 23 1917 2018 1998 1999 top-third 2001,2010