Illinois River near Burnt Cabin Marina & Resort

Illinois River typically runs highest in April, at a median 2,090 cfs, and lowest in October, at 292 cfs. The highest flow on record for any single day is 34,400 cfs, in 2016.

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 73 years of record. Statistics published by the US Geological Survey for Illinois River near Gore, OK (site 07198000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.