Alton Weather Today

Alton is a small city located in the southwestern part of Illinois, in the US. It is situated along the Mississippi River, just north of St. Louis. The climate in Alton is a humid continental one, which means that it experiences four distinct seasons. The summers are hot and humid, with temperatures in the mid-80s (Fahrenheit) and high humidity. The winters are cold, but usually not too extreme, with temperatures averaging around the mid-30s (Fahrenheit). The spring and autumn are mild, with temperatures averaging in the mid-50s (Fahrenheit). The area receives an average of 44 inches of precipitation per year.