Sangamon River in Illinois
Around here
Around Sangamon River
Camping2
Public land: USGS PAD-US
About this river
Sangamon River is a 62.1 mile river. Streamflow is measured at the USGS gauge Sangamon River at Monticello, IL (site 05572000). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1908 to 2026
Sangamon River typically runs highest in April, at a median 470 cfs, and lowest in September, at 19 cfs. The highest flow on record for any single day is 18,700 cfs, in 1927.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 193 | 51 to 477 |
| February | 284 | 109 to 664 |
| March | 427 | 216 to 828 |
| April | 470 | 262 to 915 |
| May | 380 | 213 to 789 |
| June | 265 | 120 to 583 |
| July | 117 | 49 to 274 |
| August | 34 | 16 to 81 |
| September | 19 | 10 to 59 |
| October | 20 | 9.6 to 102 |
| November | 59 | 18 to 218 |
| December | 114 | 26 to 381 |
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 117 years of record. Statistics published by the US Geological Survey for Sangamon River at Monticello, IL (site 05572000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
7 mapped launches sit in the mapped area of Sangamon River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Sangamon River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
