1991-2020 Degrees Fahrenheit 1 58.8 60.0 -1.2 36 42 1964 1997 1956 1947 normal 2 57.8 58.8 -1.0 40 38 1964 1992 1956 1947 normal 2002 3 56.5 57.8 -1.3 40 38 1948 1992 1956 1947 normal 1972,2010 4 55.6 56.8 -1.2 41 36 1948 1992 1956 1957 normal 1979,1985 5 53.7 55.7 -2.0 27 50 1949 2014,2015,2016 1956 1957 normal 6 52.9 55.0 -2.1 26 51 1949 2015 1956 1954 normal 1951,1968,1985 7 53.1 55.2 -2.1 26 51 1949 2015 1956 1954 normal 1985 8 53.8 56.2 -2.4 21 56 1949 2015 1956 1954 bottom-third 1967,1973,1974 9 54.9 57.2 -2.3 22 55 1949 2015 1956 1954 bottom-third 10 55.6 58.0 -2.4 18 59 1949 2015 1956 1954 bottom-third 1974 11 56.2 58.6 -2.4 16 60 1949 2015 1956 1954 bottom-third 1967,1971,1974,1999 12 56.7 58.9 -2.2 17 58 1949 2015 1956 1954 bottom-third 1967,1969,1999 18 55.3 57.6 -2.3 17 57 1949,1950 2015,2016 1956 1954 bottom-third 24 56.3 58.8 -2.5 7 66 1950 2016 1956 1954 bottom-tenth 1963,1976 36 56.0 58.8 -2.8 2 69 1950 2016 1950 1956 bottom-tenth 48 56.2 58.8 -2.6 5 64 1951,1952,1955,1956 2018 1956 1954 bottom-tenth 60 56.2 58.7 -2.5 4 64 1952,1953,1956 2018 1956 1955 bottom-tenth