1991-2020 Degrees Fahrenheit 1 66.5 67.6 -1.1 33 49 1969 1949 1947 1949 normal 2 61.4 62.8 -1.4 30 52 1947 2018 1947 1949 normal 3 53.0 57.0 -4.0 2 80 1947 1987 1947 1949 bottom-tenth 1945 4 45.6 50.8 -5.2 2 80 1947 2012 1947 1949 bottom-tenth 5 39.6 44.8 -5.2 2 80 1947 2012 1947 1949 bottom-tenth 6 34.8 40.1 -5.3 2 79 1979 2012 1950 1949 bottom-tenth 7 32.8 37.7 -4.9 4 77 2014 2012 1943 1949 bottom-tenth 8 -99 37.3 -99 -99 -99 2014 2012 normal 9 -99 38.6 -99 -99 -99 1979 2012 normal 10 -99 40.9 -99 -99 -99 1943,1979,2014 2012 normal 11 -99 43.5 -99 -99 -99 1943 2012 normal 12 -99 45.8 -99 -99 -99 1943,1951,1979 2012 normal 18 -99 43.9 -99 -99 -99 1951 1999 normal 24 -99 45.8 -99 -99 -99 1952,1979 2017 normal 36 -99 45.8 -99 -99 -99 1979 2000 normal 48 -99 45.8 -99 -99 -99 1968,1980 2001,2002 normal 60 -99 45.8 -99 -99 -99 1969 2002 normal