1991-2020 Degrees Fahrenheit 1 59.4 59.6 -0.2 49 37 1967 2015 1940 1939 normal 2 55.8 53.7 2.1 74 10 1966 1991 1940 1941 top-third 3 46.4 47.5 -1.1 32 52 1940 2012 1940 1941 normal 1993 4 40.6 42.4 -1.8 26 58 1940,1978 2012 1940 1941 bottom-third 1944,1961,1980 5 36.9 39.0 -2.1 23 61 1940 2012 1940 1939 bottom-third 6 35.9 37.8 -1.9 24 60 1940 2012 1940 1939 bottom-third 1982 7 36.4 38.4 -2.0 22 62 1940 2012 1940 1939 bottom-third 8 37.8 40.2 -2.4 15 69 1940 2012 1940 1939 bottom-third 1944 9 40.4 42.8 -2.4 11 73 1940 2012 1940 1939 bottom-third 1944,1968,1979 10 43.3 45.7 -2.4 11 73 1940 2012 1940 1939 bottom-third 1944,1966 11 45.9 48.2 -2.3 10 74 1940,1963 2012 1940 1939 bottom-third 1961 12 47.6 49.9 -2.3 10 74 1940,1963 2012 1940 1939 bottom-third 18 42.6 45.9 -3.3 1 81 1941 2013 1941 1940 lowest 24 47.2 50.0 -2.8 2 80 1978 2013 1941 1940 bottom-tenth 36 47.8 50.0 -2.2 2 78 1979 2013 1941 1941 bottom-tenth 1968 48 -99 50.1 -99 -99 -99 1980 2013 normal 60 -99 50.1 -99 -99 -99 1970,1981 2013 normal