1991-2020 Degrees Fahrenheit 1 43.3 45.5 -2.3 34 43 1960 2012 1998 1997 normal 1956 2 43.1 40.2 2.9 68 9 1960 2012 1998 1992 top-third 1977 3 38.2 36.8 1.4 65 12 1979 2012 1998 1992 top-third 1976,1991 4 37.7 36.0 1.7 68 9 1979 2012 1998 1992 top-third 1987,2006 5 39.9 37.6 2.3 70 7 1979 2012 1998 1992 top-tenth 6 43.1 40.8 2.3 71 6 1979 2012 1998 1992 top-tenth 2022 7 47.5 44.9 2.6 73 4 1979 2016 1998 1999 top-tenth 8 51.4 49.0 2.4 73 4 1979 2012 1998 1999 top-tenth 2022 9 54.5 52.4 2.1 71 5 1979 2012 1998 1999 top-tenth 10 56.5 54.7 1.8 71 5 1962 2012 1998 1999 top-tenth 2000 11 57.7 55.7 2.0 72 4 1962 2012 1998 1999 top-tenth 12 57.3 55.7 1.6 69 7 1962 2012 1998 1992 top-tenth 18 51.6 50.7 0.9 65 11 1979 2017 1998 1992 top-third 24 55.7 55.6 0.1 58 17 1952,1979 2013,2017 1998 1992 top-third 2001 36 55.0 55.6 -0.6 43 31 1979 2013 1998 1993 normal 48 54.5 55.6 -1.1 37 36 1980 2018,2019 1998 1995 normal 1967 60 54.7 55.6 -0.9 39 33 1962 2016,2020 1998 1995 normal