1901-2000 Degrees Fahrenheit 1 29.7 30.4 -0.7 46 84 1934 2018 1948 1949 normal 1946 2 34.1 30.2 3.9 109 21 1904 2023 1948 1949 top-third 3 35.0 31.5 3.5 104 25 1918 2002,2016 1948 1949 top-third 2008 4 37.1 34.6 2.5 99 30 1918 2016 1948 1949 top-third 5 41.5 38.6 2.9 108 21 1918 2002,2016 1948 1949 top-third 1983,1992 6 45.2 43.0 2.2 102 27 1918 2016 1948 1949 top-third 7 49.1 47.0 2.1 104 25 1918 2016 1948 1949 top-third 1972,1974 8 52.5 50.2 2.3 106 23 1905 2016 1948 1949 top-third 9 54.4 52.1 2.3 107 22 1904 2016 1949 1932 top-third 10 54.9 52.7 2.2 108 21 1918 2016 1949 1932 top-third 1995 11 54.4 52.2 2.2 107 22 1918 2016 1949 1932 top-third 12 53.1 51.0 2.1 107 22 1918 2012 1949 1932 top-third 1954,1974 18 50.7 48.3 2.4 109 19 1905 2017 1949 1950 top-third 24 52.7 51.0 1.7 104 24 1905 2017 1949 1933 top-third 1991 36 51.8 51.0 0.8 76 51 1918 2013 1949 1933 normal 48 51.8 51.0 0.8 80 46 1905 2019,2023 1949 1933 normal 1957,1974,1977,1985 60 51.7 51.0 0.7 77 48 1908 2020 1949 1950 normal 1985,1997