Willow Flat, Illinois     Custom Search   This part of Illinois has a glorious deal of outdoors activities offered. Get your sleeping bag packed and get your wheels rolling; Willow Flat in Illinois is precisely the location. The helpful operators of the campground and all the entertaining things are incentive enough to come here. High temperatures at Willow Flat during the warm months are in the 80's. Summer nighttime lows fall down to the 60's. Through the wintertime the highs are frequently in the 20's, and after the sun is down throughout the winter temperatures at Willow Flat fall into the 0's. An average amount of rainfall falls at Willow Flat. Most of the rain falls through June while February is the month with the least amount of precipitation.     Illinois Campgrounds Complete list of all campgrounds in Illinois Books about campgrounds in Illinois List of books available on Amazon.com about campgrounds in Illinois.