1925-2000 Degrees Fahrenheit 1 40.6 40.6 0.0 45 54 1992 1995 1953 1953 normal 1953,2012 2 45.4 45.1 0.3 52 47 1992 1977 1953 1951 normal 1964 3 47.2 47.6 -0.4 32 67 1948 2019 1952 1953 bottom-third 4 47.6 48.0 -0.4 33 66 1948 2019 1952 1953 bottom-third 1927 5 45.9 46.0 -0.1 41 58 1948 2019 1952 1953 normal 1938,1986 6 41.8 42.2 -0.4 35 64 1985 2016 1952 1953 normal 1937,1963 7 37.7 37.7 0.0 42 57 1971,1972 2019 1952 1953 normal 1934 8 32.3 33.6 -1.3 19 80 1972 2019 1952 1953 bottom-third 1933 9 28.3 30.1 -1.8 11 88 1971 2016 1952 1953 bottom-third 1948,1955 10 26.0 27.5 -1.5 16 82 1971 2016 1952 1953 bottom-third 1927 11 24.7 26.0 -1.3 19 79 1971 2016 1952 1953 bottom-third 1951 12 24.7 26.0 -1.3 20 78 1971 2019 1952 1953 bottom-third 18 31.1 31.4 -0.3 33 65 1956,1971 2016 1952 1953 normal 1967,2009,2012 24 26.0 26.0 0.0 36 61 1972 2019 1953 1945 normal 1963,1970,1984 36 25.5 25.9 -0.4 26 70 1973 2016 1953 1953 bottom-third 1953,1955 48 25.3 25.9 -0.6 24 71 1974 2019 1952 1953 bottom-third 1948,1955,1962 60 25.6 25.9 -0.3 30 64 1975 2019 1953 1948 bottom-third 1947,1963,1970