1991-2020 Degrees Fahrenheit 1 50.5 52.8 -2.3 36 64 1925 2007 2008 2007 normal 2 56.1 58.6 -2.5 28 72 1940 2007 2006 2008 bottom-third 1938 3 61.5 63.0 -1.5 47 53 1940 2021 2008 2007 normal 1938,1944,1951,1975,1996 4 63.4 65.7 -2.3 31 69 1940 2021 2000 2008 bottom-third 1942,1986 5 64.1 66.3 -2.2 26 74 1940 2021 1997 2008 bottom-third 1969 6 63.3 65.3 -2.0 27 73 1927 2018 1997 2008 bottom-third 1932,1934,1948,1963 7 61.4 63.1 -1.7 43 57 1940 2019 1997 2008 normal 1930,1987 8 58.7 60.0 -1.3 53 47 1940 2012,2021 1997 2008 normal 1941,1961 9 55.6 56.8 -1.2 61 39 1940 2012 2003 2008 normal 10 52.3 53.9 -1.6 46 52 1940 2012 2003 2008 normal 1984,1987 11 50.4 52.0 -1.6 52 46 1940 2012 2003 2008 normal 12 49.6 51.2 -1.6 53 43 1940 2012 2003 2008 normal 18 54.3 55.8 -1.5 49 46 1940 2012 2001 2008 normal 24 50.1 51.1 -1.0 59 32 1935 2017 2004 2008 normal 1986,1990,1995 36 50.8 51.1 -0.3 68 20 1979 2021 2005 2008 top-third 48 50.9 51.0 -0.1 66 19 1943,1964,1979 2019,2021,2022 2006 2008 top-third 2011 60 51.0 50.9 0.1 65 17 1965,1967,1982 2020 2007 2008 top-third