1991-2020 Degrees Fahrenheit 1 81.1 82.0 -0.9 75 47 1976 2010 1999 2001 normal 1941 2 80.5 80.5 0.0 98 24 1917 2010 2001 1998 top-third 1975,1981,1990,1991 3 79.3 78.4 0.9 113 8 1903 2015 2001 1994 top-tenth 1994,2021 4 77.6 76.3 1.3 114 6 1931 2015 2001 2002 top-tenth 5 75.1 74.4 0.7 105 14 1958 2020,2022 2001 1997 top-third 1948 6 73.5 72.7 0.8 101 13 1958 2020 2001 1997 top-third 1994 7 72.9 71.9 1.0 99 11 1958 2020,2022 2001 1991 top-tenth 8 72.7 71.8 0.9 96 12 1958 2020 2001 1991 top-third 2015 9 73.1 72.4 0.7 95 13 1958 2020 2001 1991 top-third 10 73.7 73.4 0.3 94 13 1958 2020 2001 1991 top-third 11 74.5 74.2 0.3 94 13 1958 2020 2001 1999 top-third 1999 12 75.1 75.0 0.1 93 14 1958 2020 2001 1999 top-third 1989,1997,2006 18 74.1 74.2 -0.1 85 16 1941,1969,1978 2020 2001 1999 top-third 1975,1995,2007 24 74.5 74.9 -0.4 70 25 1978 2021 2001 2000 top-third 1913,1975,2004 36 74.4 74.8 -0.4 63 22 1970,1971,1978 2022 1998 2001 top-third 1934,1993,1995 48 74.6 74.7 -0.1 63 14 1971 2021,2022 2001 2000 top-third 1991,2007 60 74.6 74.7 -0.1 61 11 1970 2022 2001 2001 top-third 1991,2001,2003,2006,2007