1901-2000 Degrees Fahrenheit 1 46.3 48.8 -2.5 25 104 1897 1934 1948 1947 bottom-third 2 43.0 47.1 -4.1 3 126 1903 2015 1922 1948 bottom-tenth 1922 3 39.4 45.5 -6.1 1 128 1949 2015 1949 1948 lowest 4 39.2 44.9 -5.7 1 127 1949 2015 1949 1948 lowest 5 40.9 45.8 -4.9 1 127 1949 2015 1949 1948 lowest 6 44.0 48.1 -4.1 2 126 1917 2015 1917 1948 bottom-tenth 7 47.4 51.0 -3.6 2 126 1917 2015 1917 1948 bottom-tenth 8 50.5 53.8 -3.3 2 126 1917 2015 1917 1948 bottom-tenth 9 53.0 56.2 -3.2 2 126 1917 2015 1917 1948 bottom-tenth 10 54.4 57.4 -3.0 2 126 1917 2015 1917 1948 bottom-tenth 11 54.7 57.7 -3.0 2 126 1917 2015 1917 1948 bottom-tenth 12 54.5 57.4 -2.9 2 126 1917 2015 1917 1948 bottom-tenth 18 51.9 54.3 -2.4 1 126 1949 2015 1949 1948 lowest 24 55.7 57.4 -1.7 3 124 1913 2015 1917 1948 bottom-tenth 36 56.2 57.4 -1.2 4 122 1913,1917 2016 1919 1948 bottom-tenth 1919 48 56.5 57.4 -0.9 11 114 1913 2018 1924 1948 bottom-tenth 1904,1923,1924,1950 60 56.4 57.3 -0.9 4 120 1913,1917 2018 1921 1948 bottom-tenth 1912,1914,1916,1919,1920