1991-2020 Degrees Fahrenheit 1 -99 56.5 -99 -99 -99 1949 2003 normal 2 -99 56.0 -99 -99 -99 1949 2018 normal 3 -99 58.9 -99 -99 -99 1949 2018 normal 4 -99 63.4 -99 -99 -99 1949 2018 normal 5 -99 68.5 -99 -99 -99 1973 2018 normal 6 -99 72.7 -99 -99 -99 1972 2018 normal 7 -99 75.9 -99 -99 -99 1942,1985 2021 normal 8 -99 77.8 -99 -99 -99 1942 2018 normal 9 -99 78.2 -99 -99 -99 1942 2021 normal 10 -99 77.7 -99 -99 -99 1942 2021 normal 11 -99 76.6 -99 -99 -99 1942 2018 normal 12 -99 75.2 -99 -99 -99 1942 2018 normal 18 -99 74.4 -99 -99 -99 1945 2018 normal 24 -99 75.2 -99 -99 -99 1943,1966 2018 normal 36 -99 75.2 -99 -99 -99 1944,1945,1967 2018,2019 normal 48 -99 75.2 -99 -99 -99 1945 2018 normal 60 -99 75.1 -99 -99 -99 1976 2018,2019 normal