where is quincy located
Location/Climate Location/Climate. The western most city in Illinois, Quincy is located along the eastern bank of the Mississippi River atop 90 foot limestone bluffs which overlook a wide expanse of the river and a natural harbor. Residents enjoy a moderate, four season climate where the sun shines nearly 68% of the time. This area of Illinois receives an average of 36.86 inches of rainfall a year, and an average of 24 inches of snowfall. The average winter temperature is 28 degrees and the average summer temperature is 79 degrees.