These observations are taken by the Illinois State Water Survey, located near the corner of Windsor Road and First Street in Champaign using a variety of weather instruments. Real-time conditions at this site are reported here.
For an extended view of precipitation in the Champaign-Urbana area check out the Boneyard Network and the CoCoRaHS network.
The daily and monthly data, including departures from average and seasonal snowfall and degree days, for Champaign-Urbana are found in the first 4 links. Farther down are the archives going back to 1996.
After switching over to a new server, we have noticed some problems with the daily weather pages not updating on your browser. The data are there; the local browser thinks the page has not changed and loads the local copy instead. Therefore, you may have to hit the refresh button on your browser. If that doesn't work, you may have to force a hard reload of the page by clearing your browser cache. We apologize for that and are working on a solution. However, we are short staffed on the web side these days.
The "Daily Summaries by Month" PDF are generated directly from the spreadsheet in "Current Data".