1991-2020 Degrees Fahrenheit 1 35.7 40.9 -5.2 17 107 1951 2001 2018 2017 bottom-third 2 44.8 47.0 -2.2 36 86 1925,1976 1963 2018 2017 bottom-third 3 53.3 53.0 0.3 78 44 1976 1931,2016 2018 2017 normal 1956,2010 4 57.9 57.7 0.2 83 39 1976 2016 2018 2017 top-third 1985 5 61.5 60.9 0.6 89 33 1976 2016 2018 2017 top-third 1927 6 62.8 62.4 0.4 87 35 1976 2016 2018 2018 top-third 2012,2018 7 62.2 62.1 0.1 82 40 1917 1934,2016 2014 2018 top-third 1949,1959 8 60.6 60.5 0.1 85 36 1907 2016 2018 2018 top-third 1930,1944,2018 9 57.7 58.0 -0.3 78 43 1917 2016 2014 2018 normal 1927,1936,1959,1968,1995,2000 10 54.8 55.0 -0.2 83 37 1917 2016 2015 2018 top-third 1908,1918 11 51.9 52.3 -0.4 76 40 1904 2012 2015 2018 normal 1900,1985 12 50.4 50.5 -0.1 85 29 1904 2016 2018 2017 top-third 1898,1932,1985,1995,2004 18 54.5 54.5 0.0 82 30 1904 2016 2015 2018 top-third 1941,1955,1985 24 50.3 50.5 -0.2 74 32 1904,1979 2017 2015 2018 top-third 1914,1987,2003 36 51.0 50.5 0.5 88 10 1904 2017,2018 2016 2018 top-tenth 2001 48 51.7 50.5 1.2 92 1 1904,1979 2018,2019 2018 2018 highest 2018 60 51.4 50.5 0.9 85 3 1982 2020 2018 2002 top-tenth 2021