Rocktown Adventures of Rockford
South Branch Kishwaukee River near Rocktown Adventures of Rockford
About this river
South Branch Kishwaukee River is a 23.0 mile river near Rocktown Adventures of Rockford in Illinois. Streamflow is measured at the USGS gauge South Branch Kishwaukee River near Fairdale IL (site 05439500). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2026
South Branch Kishwaukee River typically runs highest in March, at a median 347 cfs, and lowest in September, at 40 cfs. The highest flow on record for any single day is 14,600 cfs, in 1996.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 120 | 55 to 260 | |
| February | 130 | 68 to 290 | |
| March | 347 | 180 to 635 | |
| April | 322 | 187 to 614 | |
| May | 282 | 163 to 518 | |
| June | 246 | 120 to 437 | |
| July | 111 | 60 to 214 | |
| August | 55 | 29 to 118 | |
| September | 40 | 22 to 103 | |
| October | 55 | 24 to 165 | |
| November | 91 | 32 to 221 | |
| December | 125 | 40 to 257 |
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 87 years of record. Statistics published by the US Geological Survey for South Branch Kishwaukee River near Fairdale IL (site 05439500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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