1991-2020 Degrees Fahrenheit 1 76.7 74.4 2.3 115 7 1950 2015 1907 1908 top-tenth 2 73.3 72.2 1.1 108 13 1931 2015 1907 1908 top-third 1982 3 68.8 70.4 -1.6 71 49 1958 2023 1907 1908 normal 1957,1959,1992 4 66.9 68.9 -2.0 57 58 1958 2023 1907 1908 normal 1950 5 66.2 68.5 -2.3 44 67 1958 2023 1907 1908 normal 1962,1973 6 66.7 68.9 -2.2 46 63 1958 2023 1907 1908 normal 1962 7 67.7 70.2 -2.5 39 70 1958 2020,2023 1907 1903 normal 1903,1917,1930,1934,1959,2010 8 69.2 71.6 -2.4 40 68 1958 2020 1907 1908 normal 1921 9 70.4 72.9 -2.5 32 76 1958 2020 1907 1903 bottom-third 1903,1925,1930 10 71.4 73.9 -2.5 31 77 1958 2020,2023 1907 1903 bottom-third 1903,1921,1925 11 72.1 74.7 -2.6 31 77 1958 2020,2023 1907 1903 bottom-third 1903,1917,1944 12 72.5 75.0 -2.5 28 80 1958 2020 1907 1906 bottom-third 1917,1925,1927,1944,1954,1968 18 70.4 72.9 -2.5 33 64 1941 2023 1907 1908 normal 1920,1954,1965 24 72.3 74.9 -2.6 21 75 1941 2021,2023 1904 1907 bottom-third 1960,1977 36 72.4 74.8 -2.4 23 63 1941 2022 1908 1908 bottom-third 1924,1952,1953,1963 48 -99 74.8 -99 -99 -99 1911,1927,1961 2023 normal 60 -99 74.7 -99 -99 -99 1911 2023 normal