1991-2020 Degrees Fahrenheit 1 42.7 51.2 -8.5 1 93 1924 1977 1924 1923 lowest 2 39.1 44.7 -5.6 5 89 1909 1977 1909 1923 bottom-tenth 3 33.1 37.7 -4.6 14 78 1950 2010 1923 1922 bottom-third 2014 4 27.5 30.8 -3.3 26 66 1917 1998 1923 1922 bottom-third 5 20.4 25.6 -5.2 16 76 1950 1998 1923 1922 bottom-third 1956 6 20.2 23.2 -3.0 35 55 1950,1979 1998 1923 1922 normal 7 21.8 23.7 -1.9 47 41 1979 2012 1923 1921 normal 8 24.2 25.9 -1.7 49 38 1920 2012 1923 1922 normal 1914,2022 9 -99 29.1 -99 -99 -99 1920 2012 normal 10 -99 32.5 -99 -99 -99 1920 2012 normal 11 -99 35.4 -99 -99 -99 1920 2012 normal 12 -99 37.5 -99 -99 -99 1979 2012 normal 18 -99 32.7 -99 -99 -99 1951 1999 normal 24 -99 37.5 -99 -99 -99 1951 1999,2017 normal 36 -99 37.4 -99 -99 -99 1952 2000 normal 48 -99 37.4 -99 -99 -99 1952,1953 2001 normal 60 -99 37.3 -99 -99 -99 1970 2002 normal