sentences:  The county is drained by Spoon River, Kickapoo Creek, Elbow Creek, and Copperas Creek.In recent years, average temperatures in the county seat of Peoria have ranged from a low of in January to a high of in July, although a record low of was recorded in January 1884 and a record high of was recorded in July 1936.Average monthly precipitation ranged from in January to in May.