1991-2020 Degrees Fahrenheit 1 51.6 52.6 -1.0 67 63 1960 2012 1902 1903 normal 2 45.9 49.2 -3.3 32 97 1947 2012 1902 1903 bottom-third 1972 3 42.8 46.9 -4.1 16 112 1978 2023 1902 1903 bottom-third 1899,1941,1981 4 41.4 46.4 -5.0 5 123 1902 2012 1902 1903 bottom-tenth 5 42.6 47.4 -4.8 3 125 1902 1932 1902 1903 bottom-tenth 6 45.5 49.8 -4.3 3 124 1902 1932 1902 1903 bottom-tenth 1958 7 49.0 53.0 -4.0 3 124 1902 1932 1902 1903 bottom-tenth 8 52.5 56.2 -3.7 4 123 1902 2017 1902 1903 bottom-tenth 9 55.3 58.8 -3.5 4 123 1902 2017 1902 1903 bottom-tenth 1905 10 56.8 60.5 -3.7 3 124 1902,1977 2017 1902 1903 bottom-tenth 11 57.9 61.3 -3.4 4 123 1977 2017 1902 1903 bottom-tenth 1968 12 57.9 61.2 -3.3 4 123 1902 2017 1902 1903 bottom-tenth 1918 18 54.7 57.4 -2.7 4 121 1905 2017 1903 1901 bottom-tenth 1969,1977,1978 24 58.7 61.2 -2.5 6 119 1905 2017 1903 1901 bottom-tenth 1906,1984 36 58.1 61.1 -3.0 1 122 1904 2018 1904 1903 lowest 48 58.6 61.1 -2.5 2 119 1905 2019,2020 1904 1903 bottom-tenth 60 58.8 61.1 -2.3 3 116 1906 2020 1904 1903 bottom-tenth 1981