1991-2020 Degrees Fahrenheit 1 41.4 41.6 -0.2 68 59 1985 2016 2007 2008 normal 2 45.0 47.0 -2.0 26 98 1985 1988 2000 2008 bottom-third 3 52.7 53.3 -0.6 64 59 1985 1963 2007 2008 normal 1906,1923,1939,1957 4 58.2 58.8 -0.6 76 47 1985 1967 2007 2008 normal 1899,1943,1952,1976,1992,2006,2013 5 61.8 62.2 -0.4 78 45 1916 2021 2005 2008 normal 1965,2005 6 62.7 62.9 -0.2 82 41 1916 2021 2005 2008 top-third 1989 7 62.4 62.5 -0.1 84 39 1916 2021 2005 2008 top-third 1925,1949 8 60.9 61.1 -0.2 80 43 1916 2021 2008 2007 normal 1906,2019 9 58.6 59.4 -0.8 57 66 1955 2021 2008 2008 normal 1924,1942,1968,1969,1999,2008 10 56.7 57.4 -0.7 66 57 1916,1955 2015 2002 2008 normal 1904,1931 11 54.6 55.5 -0.9 67 56 1916 2015 2002 2008 normal 1918,1984 12 52.6 53.7 -1.1 56 66 1916 2015 1996 2008 normal 1945,1965,1982 18 56.0 56.8 -0.8 70 50 1916 2015 2001 2008 normal 1935,1947,1959,1970,1978,2010,2019 24 52.9 53.7 -0.8 67 52 1917 2016 1997 2008 normal 1915,1975,1977,1978,1996,1997 36 53.2 53.8 -0.6 78 39 1913,1917 2016 2002 2008 top-third 1960,2002 48 53.4 53.8 -0.4 81 34 1913 2016 2002 2008 top-third 1927 60 53.6 53.8 -0.2 91 22 1913,1920 2016 2003 2008 top-third 1995,1999,2002,2003