About this river
Kishwaukee River is a 16.5 mile river near Rocktown Adventures of Rockford in Illinois. Streamflow is measured at the USGS gauge Kishwaukee River at Marengo, IL (site 05438170). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2011 to 2026
Kishwaukee River typically runs highest in April, at a median 214 cfs, and lowest in October, at 47 cfs. The highest flow on record for any single day is 2,790 cfs, in 2018.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 83 | 47 to 169 | |
| February | 110 | 42 to 207 | |
| March | 202 | 133 to 312 | |
| April | 214 | 151 to 364 | |
| May | 173 | 117 to 290 | |
| June | 145 | 71 to 249 | |
| July | 110 | 59 to 216 | |
| August | 74 | 45 to 99 | |
| September | 52 | 31 to 80 | |
| October | 47 | 33 to 93 | |
| November | 68 | 45 to 140 | |
| December | 81 | 46 to 179 |
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 Kishwaukee River at Marengo, IL (site 05438170). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Kishwaukee 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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