With stations across the state, the Water and Atmospheric Resources Monitoring (WARM) program gathers critical data on Illinois’ water, soil, and climate. This information on growing and pest degree days, soil temperature and moisture, water table levels, and in-stream sediment is used every day by thousands of Illinoisans in the agriculture, renewable energy, and construction industries.
Soil temperatures are particularly important to farmers as they determine when to work fields and plant crops. WARM collects hourly data and provides statewide maps of soil temps 2 inches under bare soil, 4 inches under bare soil, 4 inches under sod, and 8 inches under sod. Daily maximums and minimums are available in addition to the hourly data.
On the website, users can also get soil temperature data down to the last hour for stations at Belleville, Big Bend, Bondville, Brownstown, Carbondale, Champaign, DeKalb, Dixon Springs, Fairfield, Freeport, Monmouth, Olney, Peoria, Perry, Rend Lake, Snicarte, Springfield, Stelle, and St. Charles.
To access soil temperature data and maps, visit the WARM website. Registration is required to tap all of the site's features and data, but access is free.