National Weather Service United States Department of Commerce

Cooler, dry, and breezy weather will continue the next few days in central IL, with highs mainly in the 50s today and Monday, and some mid to upper 40s Tuesday. Lows will dip to the upper 30s tonight, and potentially below freezing for much of the area Monday night as lows range from the upper 20s to mid 30s. This could damage newly emerged tender vegetation. The next chance for precipitation arrives Wednesday Night.
Freezing temperatures may develop Monday night, which could damage newly emerged tender vegetation. However, increasing mid and high level cloud cover could limit temperature drops overnight, especially in southern portions of central IL, leading to high uncertainty in temperatures. If you have any sensitive vegetation outdoors, be ready to take measures to protect it from the cold, as the coldest scenario for temperatures could result in a damaging freeze over much of the area.