About this river
Illinois River is a 21.8 mile river near Peyton's Place Resort, inc in Oklahoma. Streamflow is measured at the USGS gauge Illinois River at Chewey, OK (site 07196090). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2010 to 2026
Illinois River typically runs highest in May, at a median 1,470 cfs, and lowest in October, at 275 cfs. The highest flow on record for any single day is 86,900 cfs, in 2016.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 510 | 312 to 1,100 | |
| February | 541 | 351 to 968 | |
| March | 775 | 495 to 1,540 | |
| April | 866 | 524 to 1,435 | |
| May | 1,470 | 721 to 2,700 | |
| June | 678 | 451 to 985 | |
| July | 442 | 279 to 763 | |
| August | 387 | 260 to 537 | |
| September | 277 | 217 to 366 | |
| October | 275 | 230 to 455 | |
| November | 389 | 246 to 601 | |
| December | 493 | 284 to 924 |
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 16 years of record. Statistics published by the US Geological Survey for Illinois River at Chewey, OK (site 07196090). 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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