1991-2020 Degrees Fahrenheit 1 51.5 55.9 -4.4 9 76 1940 2017 1943 1942 bottom-third 1972 2 45.8 50.5 -4.7 6 79 1940 2012 1943 1942 bottom-tenth 1975 3 42.4 46.2 -3.8 13 72 1940 2012 1943 1942 bottom-third 2014 4 40.7 43.4 -2.7 22 63 1940 2023 1943 1942 bottom-third 1961,1969 5 39.6 42.6 -3.0 20 65 1940 2012 1943 1942 bottom-third 1962,1979 6 40.4 43.5 -3.1 15 69 1940 2012 1943 1942 bottom-third 1941,1956 7 42.5 45.6 -3.1 10 74 1940 2012 1943 1943 bottom-third 1943 8 45.6 48.6 -3.0 7 77 1940 2012 1941 1943 bottom-tenth 1970 9 49.2 51.8 -2.6 12 72 1977 2017 1943 1942 bottom-third 1966 10 52.1 54.5 -2.4 13 71 1977 2012,2017 1943 1943 bottom-third 1943 11 54.5 56.3 -1.8 22 61 1977 2012 1943 1942 bottom-third 1951,2014 12 55.4 57.0 -1.6 26 57 1977 2012 1943 1942 bottom-third 1962,1969 18 50.2 52.5 -2.3 9 73 1941 2017 1941 1943 bottom-third 1961,1967,1970 24 55.3 57.0 -1.7 19 62 1978 2017 1942 1943 bottom-third 1942,1948 36 55.7 57.0 -1.3 25 54 1979 2013,2022,2023 1943 1944 bottom-third 1945,1957,1995 48 55.3 56.9 -1.6 17 60 1980 2023 1944 1944 bottom-third 1961,1962 60 -99 56.9 -99 -99 -99 1965,1968,1981 2023 normal