1925-2000 Degrees Fahrenheit 1 40.9 40.6 0.3 49 50 1992 1995 1972 1969 normal 1941 2 44.3 45.1 -0.8 25 74 1992 1977 1971 1972 bottom-third 1943,1975 3 46.5 47.6 -1.1 13 86 1948 2019 1970 1972 bottom-third 1939,1947,1952,1980 4 46.9 48.0 -1.1 13 86 1948 2019 1970 1972 bottom-third 5 45.0 46.0 -1.0 18 81 1948 2019 1971 1972 bottom-third 1975,1985 6 41.5 42.2 -0.7 26 73 1985 2016 1972 1969 bottom-third 1930,1939,1946,1947,1956,1961,2000 7 36.8 37.7 -0.9 23 76 1971,1972 2019 1972 1970 bottom-third 1931 8 32.9 33.6 -0.7 27 72 1972 2019 1972 1970 bottom-third 1925 9 28.6 30.1 -1.5 15 84 1971 2016 1972 1970 bottom-third 1947,1951,1959 10 26.3 27.5 -1.2 20 78 1971 2016 1972 1970 bottom-third 1930,1959,1974 11 25.1 26.0 -0.9 23 75 1971 2016 1972 1970 bottom-third 1992 12 25.3 26.0 -0.7 27 71 1971 2019 1972 1970 bottom-third 18 30.4 31.4 -1.0 18 80 1956,1971 2016 1972 1970 bottom-third 24 24.0 26.0 -2.0 5 92 1972 2019 1972 1971 bottom-tenth 1966 36 23.4 25.9 -2.5 1 95 1973 2016 1973 1972 lowest 48 24.3 25.9 -1.6 5 90 1974 2019 1972 1971 bottom-tenth 60 24.5 25.9 -1.4 4 90 1975 2019 1973 1972 bottom-tenth