Alton, Illinois, United States Historical Air Quality Analysis

21°C16/28°C

21°C11/29°C

21°C13/30°C

22°C13/31°C

19°C13/25°C

18°C14/24°C

19°C11/26°C

17°C7/25°C

16°C6/26°C

18°C7/28°C

24°C16/32°C

25°C15/34°C

25°C16/35°C

27°C19/36°C

29°C21/38°C

27°C20/35°C

26°C20/35°C

25°C15/34°C

25°C14/35°C

23°C18/29°C

22°C18/29°C

24°C16/33°C

22°C18/28°C

21°C17/29°C

21°C18/26°C

20°C14/27°C

21°C12/30°C

22°C12/32°C

23°C13/34°C

24°C15/34°C

--°C/°C