1991-2020 Degrees Fahrenheit 1 38.3 41.9 -3.6 18 57 1950 1987 1950 1949 bottom-third 2 25.8 36.3 -10.5 2 73 1950 2012 1950 1949 bottom-tenth 3 22.3 30.8 -8.5 3 72 2019 2012 1950 1949 bottom-tenth 4 18.4 27.3 -8.9 4 71 1950 1992 1950 1949 bottom-tenth 5 17.6 25.9 -8.3 4 70 1950 1992 1950 1949 bottom-tenth 6 18.4 26.7 -8.3 4 70 1979 2000 1950 1949 bottom-tenth 7 22.5 29.2 -6.7 4 70 1950 2000,2012 1950 1949 bottom-tenth 8 26.7 32.9 -6.2 5 69 1950 2012 1950 1949 bottom-tenth 9 30.9 36.9 -6.0 4 70 1965 2012 1950 1949 bottom-tenth 10 34.5 40.2 -5.7 2 72 1952 1999,2012 1951 1950 bottom-tenth 11 36.9 42.3 -5.4 2 71 1952 2012 1951 1950 bottom-tenth 12 37.9 43.2 -5.3 1 72 1951,1952 1981 1951 1950 lowest 1952 18 31.2 37.7 -6.5 1 71 1951 2000 1951 1950 lowest 24 38.5 43.2 -4.7 2 69 1952 2000 1951 1951 bottom-tenth 36 -99 43.2 -99 -99 -99 1952 2000 normal 48 -99 43.2 -99 -99 -99 1953 2001 normal 60 -99 43.3 -99 -99 -99 1954 1992 normal