1901-2000 Degrees Fahrenheit 1 26.4 30.8 -4.4 28 102 1899 2012 1996 1997 bottom-third 1948 2 29.6 25.4 4.2 103 27 1899 2012 1997 1992 top-third 1984 3 26.1 21.9 4.2 103 27 1936 2012 1997 1992 top-third 1928 4 26.6 21.4 5.2 115 14 1936 2012 1997 1992 top-third 5 27.3 23.5 3.8 112 17 1899,1936 2000 1997 1992 top-third 1934 6 31.0 27.5 3.5 111 18 1899 2012 1997 1992 top-third 2022 7 35.6 32.2 3.4 114 15 1899 2012 1997 1992 top-third 1934,1987 8 39.8 37.0 2.8 113 16 1899 2012 1997 1992 top-third 1934,1983,2004 9 43.3 40.9 2.4 107 22 1899 2012 1997 1992 top-third 1942,1987 10 45.8 43.4 2.4 112 17 1899 2012 1997 1992 top-third 1987 11 46.5 44.6 1.9 107 22 1899 2012 1997 1995 top-third 1995,2004,2005 12 45.9 44.6 1.3 94 35 1899 2016 1997 1995 top-third 1941,1983 18 38.7 38.9 -0.2 54 74 1979 2013 1997 1996 normal 1924,1953,1963 24 44.1 44.6 -0.5 43 85 1952 2000 1997 1996 normal 1948,1973,1985,2019,2020 36 43.8 44.5 -0.7 30 97 1918 2000 1995 1997 bottom-third 1967 48 44.4 44.5 -0.1 47 79 1899,1918 2007 1997 1995 normal 1922,1923,1948,1960,2011 60 44.0 44.5 -0.5 30 95 1920 2006,2008 1997 1996 bottom-third 1922,1950,1955