1991-2020 Degrees Fahrenheit 1 82.0 83.3 -1.3 72 57 1903 2022 1997 1999 normal 2021 2 80.8 80.3 0.5 113 16 1903 2022 1999 1998 top-third 2010,2020 3 77.8 77.0 0.8 111 18 1903 2022 1999 1998 top-third 4 75.3 73.6 1.7 119 10 1903 2011 1999 1967 top-tenth 5 73.0 70.3 2.7 126 3 1903 2008,2009 1999 2000 top-tenth 6 70.2 67.4 2.8 127 2 1903 2006 1999 2000 top-tenth 7 68.0 65.5 2.5 126 2 1903 2017 1999 2000 top-tenth 2006 8 67.5 65.0 2.5 125 3 1973 2017 1999 2000 top-tenth 9 67.8 65.8 2.0 124 4 1977 2017 1999 2000 top-tenth 2008 10 69.2 67.3 1.9 125 3 1977 2017 1999 2000 top-tenth 11 70.8 69.0 1.8 124 4 1977 2017 1999 2000 top-tenth 12 71.9 70.4 1.5 124 4 1977 2017 1999 2000 top-tenth 18 70.9 69.4 1.5 125 3 1969 2012 1999 2000 top-tenth 2017 24 71.7 70.3 1.4 123 4 1969 2017 1999 2000 top-tenth 36 71.3 70.3 1.0 123 3 1960,1970,1977,1979 2018 1999 2000 top-tenth 48 70.8 70.3 0.5 117 8 1915,1978 2009 1999 2000 top-tenth 2001,2011,2013 60 70.7 70.3 0.4 116 8 1979 2020 1999 2000 top-tenth 2002,2018,2019