1991-2020 Degrees Fahrenheit 1 31.3 38.3 -7.0 11 73 1989 2015 1942 1943 bottom-third 2 37.8 42.7 -4.9 12 71 1989 2015 1943 1941 bottom-third 1947 3 43.1 47.8 -4.7 5 78 1976 2015 1943 1942 bottom-tenth 1960,1980 4 49.3 53.2 -3.9 8 75 1976 2015 1943 1942 bottom-tenth 1969 5 54.5 57.9 -3.4 12 71 1976 2015 1943 1941 bottom-third 6 58.4 61.3 -2.9 14 69 1976 2015 1943 1941 bottom-third 1992 7 60.3 63.0 -2.7 13 69 1962,1976 2015 1943 1943 bottom-third 1943,1965,1972 8 61.1 63.1 -2.0 27 55 1958,1976 2015 1943 1941 bottom-third 1954 9 59.8 62.1 -2.3 21 61 1950 2015 1943 1942 bottom-third 1942,1947 10 57.6 60.2 -2.6 16 65 1950 2015 1943 1942 bottom-third 1966,1969 11 55.3 58.0 -2.7 13 68 1958 2012 1943 1942 bottom-third 1965,1966,1996 12 53.4 55.9 -2.5 18 63 1958 2012 1943 1941 bottom-third 1968,1972,1992 18 54.8 57.7 -2.9 7 73 1963 2016 1943 1942 bottom-tenth 1962 24 53.2 55.9 -2.7 6 72 1963 2021 1943 1942 bottom-tenth 1961,1968,1969 36 53.2 55.8 -2.6 5 70 1963 2021 1944 1943 bottom-tenth 1965,1968,1969 48 53.4 55.8 -2.4 8 64 1963 2022 1944 1944 bottom-third 1967 60 -99 55.7 -99 -99 -99 1964,1965,1966,1969 2020,2021,2022 normal