How high is the Des Plaines River Near Lemont, IL right now?

The Des Plaines River Near Lemont, IL is currently flowing at 452 cubic feet per second with a gage height of 5.79 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Des Plaines River Near Lemont, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 35th percentile compared to the long-term historical record at this gauge.

Is the Des Plaines River Near Lemont, IL at flood stage?

No — the gage height is 4.21 feet below the NWS flood-stage threshold of 10.0 feet.

What is the historical median flow for the Des Plaines River Near Lemont, IL on June 11?

The long-term median discharge for this date is 638 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 215 to unavailable cfs.

Where is the Des Plaines River Near Lemont, IL stream gauge located?

The Des Plaines River Near Lemont, IL stream gauge is operated by the USGS in Will County, IL on the Des Plaines River. USGS site number 05533600 (coordinates 41.6724, -88.0285).

Des Plaines River Near Lemont, IL

USGS Site No: 05533600 • Des Plaines River • Will County, IL

Des Plaines River Near Lemont, IL on the Des Plaines River is currently at 452 cfs (Normal — 35th percentile for this date) . Gage height: 5.79 ft.

Reading from 1 week ago

↑ Upstream on Des Plaines River

Des Plaines River at Riverside, IL

Downstream on Des Plaines River ↓

Des Plaines River at Route 53 at Joliet, IL

452

CFS Discharge

5.79

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	215
25th	Low threshold	326
50th (Median)	Normal (median)	638	Today: 452 cfs
75th	High threshold	1,090
95th	Very High threshold	0

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	497	5.90
May 27, 2026	563	6.05
May 26, 2026	689	6.32
May 25, 2026	764	6.47
May 24, 2026	435	5.72
May 23, 2026	325	5.44
May 22, 2026	344	5.49
May 21, 2026	401	5.66
May 20, 2026	507	5.92
May 19, 2026	485	5.87
May 18, 2026	365	5.56
May 17, 2026	340	5.48
May 16, 2026	341	5.49
May 15, 2026	352	5.52
Apr 20, 2026	4,290	10.39
Apr 19, 2026	4,360	10.44
Apr 18, 2026	4,330	10.42
Apr 17, 2026	3,940	10.09
Apr 16, 2026	3,380	9.59
Apr 15, 2026	2,130	8.33
Apr 14, 2026	1,940	8.12
Apr 13, 2026	2,110	8.31
Apr 12, 2026	2,230	8.44
Apr 11, 2026	2,300	8.51
Apr 10, 2026	2,230	8.43
Apr 9, 2026	2,220	8.42
Apr 8, 2026	2,370	8.60
Apr 7, 2026	2,690	8.93
Apr 6, 2026	3,000	9.25
Apr 5, 2026	3,370	9.59

Station Information

USGS Site No: 05533600
State: IL
County: Will County
Coordinates: 41.6724, -88.0285
Drainage Area: 690 mi²
Datum (ft): 578.8
HUC Code: 07120004

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 9.5 ft
Flood Stage: 10.0 ft
Moderate Flood: 13.0 ft
Major Flood: 15.0 ft

Currently 4.21 ft below flood stage.

Recent Extremes

Max discharge: 4,360 cfs

Apr 19, 2026
Min discharge: 189 cfs

Oct 30, 2025
Days at flood stage: 4

Computed from the local daily-values archive.

Nearby Gauges

Long Run Near Lemont, IL
2.5 mi · 3 cfs

Low
Chicago Sanitary And Ship Canal at Romeoville, IL
2.8 mi · 0 cfs

Unknown
Chicago Sanitary And Ship Canal near Lemont, IL
3.6 mi · 1,300 cfs

Very Low
Sawmill Creek Near Lemont, IL
4.2 mi · 1 cfs

Low
Flag Creek Near Willow Springs, IL
8.2 mi · 12 cfs

Normal