Charleston - Illinois

Charleston is a city located in Illinois. With a current population of 19,874, it is the 125th largest city in Illinois and the 1866th largest city in the United States. Spanning over 10 miles, the city has a population density of 2,237 people per square mile.

January has the coldest night time temperatures for Charleston with an average of 20.2°F. July, on the other hand, is easily the hottest with an average high-temperature of 86.2°F. Furthermore, May is the month with the most rainfall while February still proves to be the driest.