1991-2020 Degrees Fahrenheit 1 51.3 53.8 -2.5 43 80 1907 2010 1904 1903 normal 2 48.2 48.1 0.1 87 36 1926 2012 1904 1905 top-third 3 37.8 42.7 -4.9 22 100 1978 2012 1904 1903 bottom-third 4 33.0 38.8 -5.8 9 113 1978 2012 1904 1903 bottom-tenth 5 32.1 37.5 -5.4 12 109 1978 2012 1904 1903 bottom-tenth 6 33.8 38.4 -4.6 13 108 1904 2012 1904 1903 bottom-third 7 36.7 40.8 -4.1 14 107 1904 2012 1904 1903 bottom-third 8 40.3 44.1 -3.8 12 109 1904 2017 1904 1903 bottom-tenth 9 43.6 47.5 -3.9 9 112 1904 2017 1904 1903 bottom-tenth 10 46.5 50.3 -3.8 6 115 1904 2012,2017 1904 1903 bottom-tenth 1977 11 48.5 52.4 -3.9 4 117 1904 2017 1904 1903 bottom-tenth 1912 12 49.6 53.4 -3.8 3 118 1918 2017 1904 1903 bottom-tenth 1936 18 43.3 48.4 -5.1 1 118 1905 2017 1905 1904 lowest 24 49.0 53.3 -4.3 1 118 1905 2017 1905 1904 lowest 36 49.9 53.3 -3.4 2 115 1906 2018 1905 1904 bottom-tenth 48 50.2 53.3 -3.1 1 114 1905 2019 1905 1905 lowest 60 -99 53.3 -99 -99 -99 1906 2020 normal