1901-2000 Degrees Fahrenheit 1 37.6 39.5 -1.9 35 94 1897 1934 1948 1947 bottom-third 1965 2 31.2 36.9 -5.7 5 124 1903,1933 2015 1933 1948 bottom-tenth 3 25.2 34.5 -9.3 1 128 1949 2015 1949 1948 lowest 4 25.5 33.7 -8.2 1 127 1949 2015 1949 1948 lowest 5 27.5 34.7 -7.2 1 127 1949 2015 1949 1948 lowest 6 31.4 37.4 -6.0 2 126 1917 2015 1917 1948 bottom-tenth 7 35.8 40.9 -5.1 2 126 1917 2015 1917 1948 bottom-tenth 8 39.9 44.5 -4.6 2 126 1917 2015 1917 1948 bottom-tenth 9 43.3 47.6 -4.3 2 126 1917 2015 1917 1948 bottom-tenth 10 45.3 49.2 -3.9 2 126 1917 2015 1917 1948 bottom-tenth 11 46.0 49.7 -3.7 2 126 1917 2015 1917 1948 bottom-tenth 12 46.0 49.5 -3.5 2 126 1917 2015 1917 1948 bottom-tenth 18 42.5 45.4 -2.9 1 126 1949 2015 1949 1948 lowest 24 47.3 49.5 -2.2 2 125 1913 2015 1913 1948 bottom-tenth 36 48.1 49.5 -1.4 2 124 1914 2015,2016,2017 1914 1948 bottom-tenth 48 48.2 49.5 -1.3 1 124 1915,1949 2018 1915 1948 lowest 1915 60 48.1 49.4 -1.3 1 123 1917,1949 2017,2018,2019 1917 1948 lowest 1917