1901-2000 Degrees Fahrenheit 1 16.5 21.3 -4.8 33 97 1936 1991 1994 2000 bottom-third 1955 2 20.6 19.1 1.5 73 57 1936 1992 1997 2000 normal 1970,2004 3 19.0 19.6 -0.6 51 78 1949 1992 1997 2000 normal 1925 4 19.8 22.1 -2.3 30 99 1979 2000 1997 2000 bottom-third 1986 5 24.5 26.3 -1.8 28 101 1979 2000 1997 2000 bottom-third 1971 6 29.5 30.9 -1.4 35 94 1979 2016 1997 2000 bottom-third 7 34.8 35.6 -0.8 41 88 1979 2016 1997 2000 bottom-third 1951,1973 8 39.0 39.4 -0.4 52 77 1979 1999 1997 2000 normal 9 41.1 41.5 -0.4 51 78 1979 2016 1997 2000 normal 1962,2019 10 42.2 42.4 -0.2 51 78 1917,1979 2016 1997 2000 normal 1900,1946 11 42.3 42.2 0.1 57 72 1917 2016 1997 2000 normal 1905,1911,1959 12 41.7 41.1 0.6 75 54 1952 2016 1997 2000 normal 2009 18 39.7 37.7 2.0 110 18 1917 2016 1998 2000 top-third 1991,2004 24 42.7 41.1 1.6 102 26 1952 2017 1998 2000 top-third 1964,1981 36 43.2 41.1 2.1 117 10 1918 2017 1999 2000 top-tenth 48 43.1 41.1 2.0 117 9 1952 2008,2016 2000 1992 top-tenth 1992 60 42.5 41.1 1.4 104 21 1952 2008,2017 2000 1993 top-third 1942