1901-2000 Degrees Fahrenheit 1 35.8 31.5 4.3 103 27 1978 2017 2016 2017 top-third 2002 2 30.6 29.6 1.0 73 57 1979 2017 2015 2017 normal 1956 3 31.0 30.3 0.7 66 63 1978 1932 2015 2017 normal 1930,1943,1974 4 34.3 33.3 1.0 79 50 1977 1932 2015 2017 normal 1928 5 39.2 37.8 1.4 92 37 1977 1932 2015 2017 top-third 1923,1928,1941,1990 6 44.3 42.7 1.6 95 34 1977 1932 2015 2017 top-third 1934,1947 7 48.1 47.2 0.9 81 48 1977 1932 2015 2017 normal 8 51.8 50.9 0.9 86 43 1977 1932 2015 2017 top-third 1941 9 54.1 53.3 0.8 84 45 1977 1932 2015 2017 normal 1901,1983,1987 10 55.1 54.3 0.8 84 45 1977 1932 2015 2017 normal 1988 11 55.3 54.1 1.2 97 32 1918 1932 2015 2017 top-third 1915,2019 12 54.5 53.1 1.4 103 26 1918 2017 2015 2017 top-third 1931,1974,1987 18 52.4 49.6 2.8 124 4 1905 2017 2016 2017 top-tenth 24 55.7 53.1 2.6 125 3 1905 2013,2017 2016 2017 top-tenth 36 55.5 53.0 2.5 125 2 1979 2013 2017 2013 top-tenth 48 54.5 53.0 1.5 118 8 1980 2019 2017 2014 top-tenth 1956,1957,2014,2023 60 53.8 53.0 0.8 90 35 1981 2020 2001 2017 top-third 1924,2001