Cook County Precipitation Network Daily Data Archive
These data are collected as part of the “A 25-Raingage Network for Collection, Reduction, and Analysis of Precipitation Data for Lake Michigan Diversion Accounting” program.
Please choose up to five stations below, and a range of years below that. Click "Get Data". All data are daily precipitation data, collected for the 24-hour period midnight to midnight on the given day.
The daily data offered here are provided by the Illinois State Water Survey. Please view our data disclaimer before downloading anything provided on this web site. Stations are listed by station number.
Provisional near real-time 10-minute and hourly precipitation data are also available for the Cook County Precipitation Network site.