Illinois State Water Survey
Institute of Natural Resource Sustainability
University of Illinois

Illinois State Climatologist Office

Jim Angel, state climatologist

Soil Temperature Climatology For Illinois

Jim Angel, state climatologist

Soil temperatures are important for a variety of agricultural and horticultural activities. Long-term averages have been calculated from a network of sites established in the 1990s by the Illinois State Water Survey, called the Water and Atmospheric Resource Monitoring (WARM) program. These are daily averages calculated from all available data at each station for soil temperatures at 4 and 8 inches. The measurements are made under grass. Soil temperatures under other ground covers or under bare ground will vary somewhat from those shown here.

More information on soil temperatures, including current conditions can be found on the WARM site.

Belleville 4-inch plot 8-inch plot
Bondville 4-inch plot 8-inch plot
Brownstown 4-inch plot 8-inch plot
Carbondale 4-inch plot 8-inch plot
Champaign 4-inch plot 8-inch plot
De Kalb 4-inch plot 8-inch plot
Dixon Springs 4-inch plot 8-inch plot
Fairfield 4-inch plot 8-inch plot
Freeport 4-inch plot 8-inch plot
Kilbourne 4-inch plot 8-inch plot
Monmouth 4-inch plot 8-inch plot
Olney 4-inch plot 8-inch plot
Peoria 4-inch plot 8-inch plot
Peoria Wildlife Park 4-inch plot 8-inch plot
Perry 4-inch plot 8-inch plot
Rend Lake 4-inch plot 8-inch plot
St. Charles 4-inch plot 8-inch plot
Springfield 4-inch plot 8-inch plot
Stelle 4-inch plot 8-inch plot