1901-2000 Degrees Fahrenheit 1 51.8 52.3 -0.5 52 78 1960 2012 1920 1922 normal 1902 2 48.2 48.7 -0.5 48 82 1947 2012 1920 1922 normal 1936,1977 3 47.9 46.6 1.3 80 50 1978 2023 1920 1922 normal 1910,1975 4 48.5 45.8 2.7 106 23 1978 2012,2023 1920 1922 top-third 1952 5 49.4 46.8 2.6 109 20 1977 2012,2017,2023 1921 1922 top-third 1950 6 51.7 49.2 2.5 113 16 1977 2017 1922 1907 top-third 1991,2000 7 55.0 52.5 2.5 115 14 1977 2017 1921 1922 top-third 8 57.6 55.6 2.0 113 16 1977 2017 1921 1922 top-third 2000 9 59.8 58.0 1.8 111 18 1977 2017 1921 1922 top-third 10 61.5 59.7 1.8 112 17 1977 2017 1921 1922 top-third 2021 11 62.2 60.5 1.7 115 14 1977 2017 1921 1922 top-third 12 62.3 60.5 1.8 118 11 1977 2017 1921 1922 top-tenth 1907,1937 18 58.7 56.7 2.0 120 8 1978 2017 1921 1922 top-tenth 1933,2000 24 62.5 60.5 2.0 123 5 1978 2017 1922 1923 top-tenth 2012 36 62.2 60.5 1.7 120 7 1970 2018 1922 1923 top-tenth 2023 48 62.0 60.5 1.5 119 7 1970 2020 1922 1923 top-tenth 60 61.8 60.5 1.3 118 7 1970 2020 1922 1923 top-tenth