1991-2020 Degrees Fahrenheit 1 25.8 29.9 -4.1 26 50 1951 2012 2011 2012 normal 2 25.7 24.5 1.2 48 28 2019 2016 2011 2012 normal 3 22.7 21.7 1.0 54 22 1950 1992 2011 2012 top-third 1998,2022 4 21.4 21.1 0.3 50 25 1950 1992 2011 2012 top-third 5 23.5 22.9 0.6 51 24 1979 2000 2011 2012 top-third 6 26.6 26.4 0.2 46 29 1979 2012 2011 2012 normal 1963 7 31.3 30.9 0.4 47 28 1952 2012 2011 2012 normal 2017 8 35.9 35.5 0.4 49 26 1952 2012,2016 2011 2012 normal 1953 9 40.3 39.2 1.1 57 18 1952 2012,2016 2011 2012 top-third 2005 10 42.8 41.5 1.3 61 13 1952 2016 2011 2012 top-third 1990,2008 11 43.7 42.5 1.2 59 15 1952 2016 2011 2012 top-third 2002 12 44.0 42.4 1.6 63 11 1952 2016 2011 2012 top-third 18 40.1 37.0 3.1 72 1 1952 2013 2012 2013 highest 24 44.5 42.4 2.1 69 3 1952 2000 2012 2000 top-tenth 36 43.0 42.4 0.6 56 14 1952 2000 2012 2008 top-third 48 42.1 42.4 -0.3 46 22 1953 1992 2012 2009 top-third 1964,2004 60 41.7 42.4 -0.7 37 29 1954 1992 2012 2012 normal 1964,2012