The Illinois State Climatologist provides maps of current climate conditions in Illinois including precipitation, mean temperature, maximum temperature, minimum temperature, and snowfall for selected time periods. These are typically updated around 11 am each day. Additional maps for the Midwest are available from the Applied Climate Information System (ACIS) and the Midwest Regional Climate Center (MRCC).
The State Climate Office (SCO) also operates the NOAA Cooperative Weather Observation Station for Champaign-Urbana (CHAMPAIGN 3S), these data are updated daily and can be found here.
If you have any data questions or requests, please e-mail the IL-SCO at firstname.lastname@example.org