1991-2020 Degrees Fahrenheit 1 31.2 26.1 5.1 103 27 1936 2016 2004 1999 top-third 2 25.5 25.6 -0.1 77 53 1936 1992 2001 2004 normal 3 27.3 25.5 1.8 97 32 1969 1992 2004 2003 top-third 4 29.6 27.5 2.1 100 29 1969 1926,1931 2004 2003 top-third 5 32.5 31.0 1.5 95 33 1969 2000 2004 2002 top-third 1919 6 36.2 35.4 0.8 90 38 1969 1961 2004 2002 top-third 1946,1976 7 40.2 39.8 0.4 87 41 1969 1964 2003 2004 top-third 1908,1919,1955,1988,1991,2008 8 43.6 43.3 0.3 84 44 1969 1961 2003 2004 normal 1990 9 45.0 45.1 -0.1 73 55 1969 1931,1961,2016 2001 2004 normal 1970,1975 10 45.3 45.7 -0.4 65 63 1969 1931 2001 2004 normal 1901,1933,1975 11 45.3 45.4 -0.1 71 57 1969 1931 2003 2004 normal 1975,1991 12 44.8 44.5 0.3 89 39 1952 2016 2003 2004 top-third 18 41.7 41.5 0.2 94 32 1979 2013 2003 2004 top-third 1946,1962,1968,1995 24 45.1 44.5 0.6 103 23 1952 1935 2004 2002 top-third 1992,2009 36 44.3 44.5 -0.2 85 39 1952 1989 1999 2004 top-third 1936,1944,1961,1975 48 44.9 44.5 0.4 105 17 1952 2016 2004 2002 top-third 1991 60 44.7 44.6 0.1 99 21 1952 2016 2001 2004 top-third 1945,1964