About this river
Illinois River is a 6.1 mile river near Ozark Kayak in Arkansas. Streamflow is measured at the USGS gauge Illinois River at Savoy, AR (site 07194800). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1979 to 2026
Illinois River typically runs highest in May, at a median 159 cfs, and lowest in September, at 20 cfs. The highest flow on record for any single day is 21,300 cfs, in 2016.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 71 | 30 to 162 | |
| February | 103 | 42 to 216 | |
| March | 122 | 67 to 237 | |
| April | 129 | 66 to 278 | |
| May | 159 | 68 to 336 | |
| June | 72 | 36 to 119 | |
| July | 32 | 18 to 64 | |
| August | 26 | 13 to 42 | |
| September | 20 | 13 to 36 | |
| October | 26 | 17 to 46 | |
| November | 39 | 21 to 95 | |
| December | 55 | 24 to 159 |
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 28 years of record. Statistics published by the US Geological Survey for Illinois River at Savoy, AR (site 07194800). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Illinois River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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