About this river
Pecatonica River is a 44.2 mile river near Rocktown Adventures of Rockford in Illinois. Streamflow is measured at the USGS gauge Pecatonica River near Shirland, Ill (site 05437050). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2026
Pecatonica River typically runs highest in March, at a median 2,500 cfs, and lowest in October, at 1,120 cfs. The highest flow on record for any single day is 20,700 cfs, in 2019.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 1,310 | 790 to 2,010 | |
| February | 1,370 | 880 to 2,500 | |
| March | 2,500 | 1,620 to 4,780 | |
| April | 2,235 | 1,465 to 3,630 | |
| May | 1,940 | 1,270 to 2,800 | |
| June | 1,830 | 1,210 to 3,185 | |
| July | 1,500 | 993 to 2,460 | |
| August | 1,210 | 825 to 2,120 | |
| September | 1,125 | 755 to 1,860 | |
| October | 1,120 | 690 to 1,720 | |
| November | 1,205 | 830 to 1,920 | |
| December | 1,200 | 775 to 1,810 |
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 43 years of record. Statistics published by the US Geological Survey for Pecatonica River near Shirland, Ill (site 05437050). 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 Pecatonica 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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