1991-2020 Degrees Fahrenheit 1 -99 28.3 -99 -99 -99 1978 2017 normal 2 -99 26.8 -99 -99 -99 1912 2017 normal 3 -99 28.1 -99 -99 -99 1904 1932 normal 4 -99 31.3 -99 -99 -99 1904 1932 normal 5 -99 35.7 -99 -99 -99 1904 1932 normal 6 -99 40.6 -99 -99 -99 1977 1932 normal 7 -99 45.0 -99 -99 -99 1977 1932 normal 8 -99 48.6 -99 -99 -99 1977 1932 normal 9 -99 51.0 -99 -99 -99 1904 1932 normal 10 -99 51.9 -99 -99 -99 1918 1932 normal 11 -99 51.7 -99 -99 -99 1918 1932 normal 12 -99 50.5 -99 -99 -99 1918 2017 normal 18 -99 47.2 -99 -99 -99 1918 2017 normal 24 -99 50.5 -99 -99 -99 1918 2017 normal 36 -99 50.5 -99 -99 -99 1918 2018 normal 48 -99 50.5 -99 -99 -99 1980 2019 normal 60 -99 50.4 -99 -99 -99 1981 2020 normal