Illinois, Climate Division 5. East, Average Temperature Rankings, August 1955 1901-2000 Degrees Fahrenheit 1 75.6 72.1 3.5 117 12 1915 1947 1954 1947 top-tenth 2 77.3 73.3 4.0 124 5 1915 1936 1954 1936 top-tenth 1995 3 73.8 72.3 1.5 100 29 1915 1936 1951 1954 top-third 2018,2021 4 71.2 69.5 1.7 105 24 1915 1934 1954 1953 top-third 1977 5 68.3 65.5 2.8 122 7 1907 1991 1954 1934 top-tenth 1921 6 63.3 61.0 2.3 118 11 1904 2012 1954 1936 top-tenth 7 58.3 56.2 2.1 114 15 1904 2012 1953 1954 top-third 2000 8 54.1 52.2 1.9 112 17 1904,1912 2012 1952 1954 top-third 1932,1934,2000,2020 9 51.5 49.5 2.0 108 20 1904 2012 1952 1954 top-third 1919,1949,2000,2007 10 50.3 48.5 1.8 104 24 1904 2012 1952 1954 top-third 11 50.7 49.0 1.7 110 18 1904 2012 1953 1954 top-third 1949,2007,2010,2022 12 52.2 50.3 1.9 111 17 1904 2012 1953 1954 top-third 2022 18 55.5 53.9 1.6 108 20 1904 2012 1953 1954 top-third 1934 24 52.5 50.3 2.2 117 10 1905 2017 1954 1933 top-tenth 1933 36 52.2 50.3 1.9 118 8 1904 2018 1954 1934 top-tenth 1933,2013,2019 48 51.8 50.3 1.5 112 13 1905 2019 1954 1935 top-third 1933,2006 60 51.2 50.3 0.9 89 35 1906 2020 1954 1936 top-third 1932,1993