1991-2020 Degrees Fahrenheit 1 27.8 29.3 -1.5 75 55 1934 2018 1969 1970 normal 2 24.0 28.2 -4.2 30 100 1904 2023 1970 1969 bottom-third 1899,1941 3 24.4 29.8 -5.4 14 115 1918 2016 1959 1970 bottom-third 4 29.1 33.0 -3.9 28 100 1918 2012,2016,2023 1970 1969 bottom-third 1943 5 33.9 36.9 -3.0 35 93 1905,1918 2023 1970 1969 bottom-third 1897,1901,1943,1978 6 38.7 41.4 -2.7 40 88 1918 2012,2016 1970 1969 bottom-third 1943,1946 7 43.3 45.7 -2.4 51 77 1905 2023 1970 1969 normal 1900,1901,1938,1956 8 46.9 49.0 -2.1 59 69 1905 2023 1970 1969 normal 1906 9 48.8 50.9 -2.1 55 73 1904 2023 1970 1969 normal 1938 10 49.8 51.5 -1.7 64 64 1918 2023 1970 1967 normal 2004 11 49.5 51.1 -1.6 70 58 1918 2023 1970 1969 normal 1962,1964,1966,1969,1978 12 48.1 49.8 -1.7 55 73 1918 2023 1970 1969 normal 1931,1966,1982,1987,2015 18 44.8 47.0 -2.2 41 85 1905 2017 1968 1970 bottom-third 1901,1913,1942,1982,1994 24 48.0 49.8 -1.8 49 77 1918 2023 1969 1970 normal 1930,1944,1957 36 48.1 49.7 -1.6 54 70 1918 2023 1970 1967 normal 1944,1946,1957,1966 48 47.7 49.7 -2.0 38 84 1920 2023 1968 1970 bottom-third 1914,1916,1964,1968 60 47.9 49.6 -1.7 44 76 1908 2023 1970 1970 normal 1939,1966,1967,1968,1969,1970,1972