1901-2000 Degrees Fahrenheit 1 56.5 53.7 2.8 104 25 1907 1934 1990 1988 top-third 2 51.0 47.5 3.5 114 15 1907 1977 1990 1988 top-third 3 44.0 39.9 4.1 118 11 1899 1977 1990 1988 top-tenth 1986,2000 4 39.3 32.9 6.4 124 5 1899 1977 1990 1987 top-tenth 5 32.8 27.6 5.2 118 11 1950 1987 1989 1990 top-tenth 1998 6 28.8 25.1 3.7 109 19 1950 2012 1990 1990 top-third 1990,2005 7 29.0 25.3 3.7 110 18 1979 2012 1990 1988 top-third 8 30.8 27.7 3.1 110 18 1899 2012 1990 1988 top-third 1976 9 34.1 30.8 3.3 113 15 1899 2012 1990 1988 top-third 10 37.6 34.4 3.2 115 13 1899 2012 1990 1987 top-tenth 2021 11 40.4 37.6 2.8 114 14 1899 2012 1990 1987 top-third 12 42.4 39.7 2.7 112 16 1899 2012 1990 1988 top-third 18 37.8 34.8 3.0 114 13 1951 1988 1990 1988 top-tenth 2012,2022 24 42.2 39.7 2.5 115 12 1917 2017 1990 1988 top-tenth 2022 36 41.8 39.7 2.1 116 10 1899 2000 1990 1990 top-tenth 1990 48 41.9 39.6 2.3 117 8 1899 2001 1989 1990 top-tenth 2017 60 42.3 39.6 2.7 123 1 1920 1991,2002 1990 1991 highest 2002