1991-2020 Degrees Fahrenheit 1 48.4 44.7 3.7 86 6 1949 1953 1997 1998 top-tenth 2005 2 46.4 45.0 1.4 75 17 1984 2022 1998 1995 top-third 3 49.9 47.7 2.2 86 6 1977 2022 1998 1950 top-tenth 4 54.8 52.2 2.6 89 3 1977 2022 1998 1999 top-tenth 5 59.7 56.8 2.9 89 3 1977 2022 1998 1999 top-tenth 6 63.3 61.0 2.3 88 4 1977 2022 1998 1999 top-tenth 7 66.6 64.1 2.5 90 2 1977 2017 1998 1999 top-tenth 2022 8 69.0 66.3 2.7 91 1 1977 1999 1998 1999 highest 9 70.1 67.2 2.9 90 1 1977 1999 1998 1999 highest 10 69.2 67.0 2.2 88 3 1977 2023 1998 1999 top-tenth 11 67.8 66.1 1.7 87 4 1977 2012 1998 1999 top-tenth 2013,2021 12 66.3 64.7 1.6 88 3 1977 2012 1998 1999 top-tenth 2018,2023 18 64.4 63.4 1.0 81 9 1977 2023 1998 1935 top-tenth 2001 24 64.7 64.6 0.1 71 18 1977 2013 1998 1935 top-third 36 64.5 64.6 -0.1 68 19 1977 2019 1998 1954 top-third 1954 48 64.4 64.5 -0.1 63 22 1977 2020 1998 1955 top-third 1954 60 64.5 64.5 0.0 62 21 1977 2021 1998 1999 top-third 2008