Sangamon River at Monticello, IL
River level and flood forecast · Piatt County
Normal5.2 ftas of Mon 4 PM
The river is 7.8 ft below flood stage (13 ft).
Flow: 76 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 20 ft |
| Moderate flood stage | 17 ft |
| Flood stage | 13 ft |
| Action stage | 11 ft |
| Record crest (April 13, 1994) | 19.06 ft |
What floods at each level
From the National Weather Service, highest first.
- 20 ftDamage begins in Monticello.
- 13 ftFlooding of agricultural areas begins.
Highest crests on record
- 19.06 ft — April 13, 1994
- 18.79 ft — June 4, 2008
- 18.56 ft — December 29, 2015
- 18.55 ft — May 16, 1968
- 18.5 ft — October 4, 1926
Recent crests: 17.37 ft (August 18, 2026) · 10.94 ft (July 12, 2026) · 10.45 ft (July 5, 2026) · 10.94 ft (July 1, 2026) · 14.7 ft (June 21, 2026)
Up and down the river, and nearby
- DownstreamSangamon River at Riverton, IL
- Salt Creek (IL) near Farmer City, IL
- Copper Slough at Champaign, IL
- Lake Fork (E-IL) at Atwood, IL
- North Fork Salt Creek (IL) near De Witt, IL
- Boneyard Creek below Champaign - 6th St, IL
- Boneyard Creek at Urbana - University of Illinois, IL
- Kaskaskia River below Ficklin, IL
- Boneyard Creek at Urbana - Lincoln Ave., IL
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MNTI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.