1901-2000 Degrees Fahrenheit 1 54.3 53.7 0.6 79 50 1907 1934 1997 1998 normal 1933 2 48.5 47.5 1.0 82 47 1907 1977 1997 1998 normal 1937,2000 3 42.7 39.9 2.8 104 25 1899 1977 1998 1994 top-third 1925 4 37.8 32.9 4.9 118 11 1899 1977 1997 1998 top-tenth 5 31.6 27.6 4.0 111 18 1950 1987 1997 1998 top-third 1983 6 29.2 25.1 4.1 113 15 1950 2012 1997 1998 top-third 1977,1988 7 29.2 25.3 3.9 112 16 1979 2012 1997 1998 top-third 1958 8 31.2 27.7 3.5 115 13 1899 2012 1997 1998 top-tenth 2021 9 34.7 30.8 3.9 119 9 1899 2012 1997 1998 top-tenth 10 38.3 34.4 3.9 120 8 1899 2012 1997 1998 top-tenth 11 41.2 37.6 3.6 120 8 1899 2012 1997 1998 top-tenth 1992 12 42.7 39.7 3.0 115 13 1899 2012 1997 1998 top-tenth 2021 18 39.0 34.8 4.2 123 4 1951 1988 1998 1988 top-tenth 24 43.2 39.7 3.5 125 2 1917 2017 1998 1999 top-tenth 2000 36 41.2 39.7 1.5 102 24 1899 2000 1998 1993 top-third 1941,1955,2004 48 40.4 39.6 0.8 83 42 1899 2001 1998 1994 normal 1932,1940,1945,1994,2010 60 40.5 39.6 0.9 82 42 1920 1991,2002 1998 1994 normal