1991-2020 Degrees Fahrenheit 1 17.8 28.4 -10.6 3 97 1977 1932 1945 1969 bottom-tenth 2 22.4 30.9 -8.5 4 96 1977 1932 1961 1969 bottom-tenth 3 28.1 34.7 -6.6 3 95 1977 1932 1961 1969 bottom-tenth 1961 4 33.6 39.3 -5.7 3 94 1977 1932 1945 1969 bottom-tenth 5 39.3 44.4 -5.1 2 95 1977 1932 1963 1969 bottom-tenth 1945,1963 6 44.5 48.9 -4.4 4 93 1977 1932 1968 1969 bottom-tenth 1968 7 48.3 52.5 -4.2 4 93 1977 1932 1963 1969 bottom-tenth 8 50.8 54.6 -3.8 4 93 1977 2016 1963 1969 bottom-tenth 9 51.9 55.2 -3.3 9 88 1977 2016 1968 1969 bottom-tenth 10 51.9 54.7 -2.8 11 86 1925 2016 1968 1969 bottom-third 1929,1948,1957,1982 11 50.4 53.3 -2.9 16 81 1925 2012,2013,2017 1968 1969 bottom-third 1982 12 48.6 51.4 -2.8 15 82 1925 2013 1968 1969 bottom-third 1926 18 48.4 50.5 -2.1 27 66 1941 2017 1969 1967 bottom-third 1966,1980 24 49.2 51.3 -2.1 24 69 1926 2013 1969 1967 bottom-third 1934,1966,1982 36 48.5 51.3 -2.8 1 88 1941,1942,1970 2022,2023 1942 1969 lowest 1941,1942 48 48.8 51.3 -2.5 5 81 1971 2023 1968 1969 bottom-tenth 1944,1966,1968,1980 60 48.9 51.2 -2.3 5 78 1944,1945 2021,2023 1968 1969 bottom-tenth 1941,1942,1971,1972