1991-2020 Degrees Fahrenheit 1 59.3 67.0 -7.7 10 112 1958 2018 1912 1939 bottom-tenth 2 57.1 65.7 -8.6 2 115 1958 2023 1940 1939 bottom-tenth 3 59.0 66.2 -7.2 2 111 1958 2017 1940 1939 bottom-tenth 4 60.5 67.5 -7.0 2 109 1958 2023 1940 1939 bottom-tenth 5 63.8 69.5 -5.7 4 107 1958 2017 1904 1939 bottom-tenth 6 66.5 71.6 -5.1 4 106 1958 2017,2020 1904 1939 bottom-tenth 7 68.4 73.2 -4.8 4 106 1958 2017 1904 1939 bottom-tenth 8 69.9 74.4 -4.5 4 106 1958 2017 1904 1939 bottom-tenth 9 70.9 75.3 -4.4 4 106 1958 2017 1904 1939 bottom-tenth 10 71.4 75.6 -4.2 4 106 1904 2017,2020,2023 1904 1939 bottom-tenth 11 71.5 75.5 -4.0 5 104 1904 2023 1911 1939 bottom-tenth 12 71.3 75.0 -3.7 6 103 1904 2023 1911 1939 bottom-tenth 18 70.6 73.8 -3.2 11 87 1911 2021 1915 1934 bottom-third 1910,1969,1977 24 72.0 74.9 -2.9 12 85 1911 2017 1927 1934 bottom-third 1912,1926,1952,1961 36 -99 74.8 -99 -99 -99 1911,1941 2023 normal 48 -99 74.8 -99 -99 -99 1911 2023 normal 60 -99 74.8 -99 -99 -99 1911 2023 normal