1991-2020 Degrees Fahrenheit 1 32.7 35.5 -2.8 31 53 1979 2017 1944 1943 normal 1973 2 28.2 34.4 -6.2 9 75 1978 2023 1945 1944 bottom-third 2003 3 29.2 35.7 -6.5 4 80 1977 2016 1945 1944 bottom-tenth 4 32.9 38.5 -5.6 5 78 1977 2016 1945 1944 bottom-tenth 5 37.1 42.3 -5.2 3 80 1977 2016 1945 1944 bottom-tenth 6 42.2 46.8 -4.6 4 79 1977 2016 1945 1944 bottom-tenth 1970 7 46.9 51.1 -4.2 5 78 1977 2016 1941 1944 bottom-tenth 1968,1970 8 50.8 54.4 -3.6 7 76 1977 2016 1941 1944 bottom-tenth 1982 9 53.1 56.5 -3.4 6 76 1977 2016 1945 1944 bottom-tenth 1982 10 54.4 57.2 -2.8 10 72 1977 2016 1945 1944 bottom-third 1993 11 53.9 56.9 -3.0 4 78 1977 2016 1945 1944 bottom-tenth 1948,1959 12 52.6 55.8 -3.2 5 76 1968 2017 1945 1944 bottom-tenth 1961 18 49.4 52.8 -3.4 2 78 1978 2017 1945 1944 bottom-tenth 1979 24 52.8 55.7 -2.9 1 77 1945,1964,1968,1969,1978 2017 1945 1944 lowest 1964,1968,1969,1978 36 53.1 55.7 -2.6 5 70 1963,1970 2018 1945 1944 bottom-tenth 1964,1969 48 53.3 55.6 -2.3 7 65 1964,1970 2023 1945 1945 bottom-tenth 1965,1966 60 -99 55.6 -99 -99 -99 1970 2020 normal