1991-2020 Degrees Fahrenheit 1 62.5 70.0 -7.5 6 116 1931 2003 1914 1925 bottom-tenth 2 62.3 68.5 -6.2 14 107 1958 2023 1924 1925 bottom-third 3 61.7 67.1 -5.4 12 104 1958 2023 1914 1925 bottom-tenth 4 61.8 67.2 -5.4 8 104 1958 2017 1926 1925 bottom-tenth 1970 5 63.0 68.0 -5.0 10 100 1958 2023 1926 1925 bottom-tenth 6 65.3 69.6 -4.3 17 93 1958 2020 1924 1925 bottom-third 7 67.5 71.4 -3.9 17 92 1958 2020 1924 1925 bottom-third 1911,1963 8 69.1 72.8 -3.7 16 93 1958 2020 1924 1925 bottom-third 1936,1964 9 70.3 73.9 -3.6 15 94 1958 2020 1924 1925 bottom-third 10 71.2 74.7 -3.5 14 95 1958 2017,2020,2023 1924 1925 bottom-third 1941 11 71.5 75.1 -3.6 12 97 1958 2020 1924 1925 bottom-third 1951,1955,1956 12 71.4 75.0 -3.6 10 98 1904 2020,2023 1924 1925 bottom-tenth 1924,1969 18 69.9 73.1 -3.2 13 85 1941 2023 1911 1925 bottom-third 1910 24 72.0 74.9 -2.9 12 84 1941 2021 1925 1925 bottom-third 1910,1925,1955 36 71.8 74.8 -3.0 3 83 1941 2021,2022,2023 1911 1925 bottom-tenth 1960 48 72.1 74.8 -2.7 4 74 1911 2023 1912 1925 bottom-tenth 1910,1912,1956,1969 60 72.2 74.8 -2.6 6 67 1911 2023 1914 1925 bottom-tenth 1910,1914,1955,1964