1991-2020 Degrees Fahrenheit 1 33.9 35.8 -1.9 48 40 1989 2015 1951 1949 normal 2 38.3 40.3 -2.0 42 46 1989 2015 1951 1950 normal 1983 3 42.7 45.1 -2.4 30 58 1976 2011,2015 1951 1950 normal 4 48.2 50.3 -2.1 37 51 1976 2015 1951 1950 normal 5 52.8 54.8 -2.0 39 49 1976 2015 1951 1949 normal 1938 6 56.7 58.0 -1.3 49 39 1962 2011 1951 1949 normal 1979,1993 7 58.6 59.4 -0.8 55 33 1962 2011 1951 1949 normal 8 58.3 59.3 -1.0 53 35 1940,1962 2011,2015 1951 1949 normal 1979,2004 9 57.2 58.1 -0.9 54 34 1940 2011 1951 1949 normal 2009 10 55.1 56.1 -1.0 52 36 1940 2010,2011,2021,2022 1951 1949 normal 1993 11 52.9 53.9 -1.0 55 33 1940 2010,2012,2022 1951 1949 normal 1997 12 51.0 51.9 -0.9 60 28 1940 2012 1951 1949 top-third 1957,2005 18 52.5 53.9 -1.4 49 38 1940 2012 1951 1951 normal 1951,1985 24 50.9 51.9 -1.0 56 31 1940 2021 1951 1950 normal 1950,1990,2005 36 50.5 51.9 -1.4 47 39 1940 2012,2022 1950 1951 normal 1975,1983,1994 48 50.9 51.8 -0.9 56 29 1942,1943 2013,2022 1951 1952 normal 1953,1954,1992,1997 60 50.6 51.8 -1.2 49 35 1943 2022 1951 1952 normal