1991-2020 Degrees Fahrenheit 1 46.0 44.7 1.3 71 21 1949 1953 1951 1953 top-third 2 43.1 45.0 -1.9 31 61 1984 2022 1949 1953 normal 1987 3 46.3 47.7 -1.4 36 56 1977 2022 1949 1953 normal 1993 4 50.9 52.2 -1.3 36 56 1977 2022 1949 1953 normal 1975,1978,1990,2019 5 56.1 56.8 -0.7 50 42 1977 2022 1949 1953 normal 1938,1969 6 60.4 61.0 -0.6 52 40 1977 2022 1949 1953 normal 1941,2005,2014 7 63.9 64.1 -0.2 62 30 1977 2017 1951 1953 top-third 1932,1998 8 66.6 66.3 0.3 73 19 1977 1999 1953 1952 top-third 2011 9 67.3 67.2 0.1 70 21 1977 1999 1953 1952 top-third 1978 10 66.9 67.0 -0.1 69 22 1977 2023 1953 1952 top-third 1957,1997,2015 11 66.2 66.1 0.1 73 18 1977 2012 1953 1952 top-third 1934,2001,2016 12 64.6 64.7 -0.1 72 19 1977 2012 1953 1952 top-third 1955 18 63.5 63.4 0.1 72 18 1977 2023 1952 1953 top-third 1952,2002 24 64.3 64.6 -0.3 64 25 1977 2013 1951 1953 top-third 1956,2010 36 64.5 64.6 -0.1 68 19 1977 2019 1953 1954 top-third 1999 48 64.4 64.5 -0.1 63 22 1977 2020 1953 1954 top-third 1999 60 64.3 64.5 -0.2 58 25 1977 2021 1953 1954 top-third 1957,2010