How high is the Kishwaukee River at Marengo, IL right now?

The Kishwaukee River at Marengo, IL is currently flowing at 64 cubic feet per second with a gage height of 7.60 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Kishwaukee River at Marengo, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 27th percentile compared to the long-term historical record at this gauge.

Is the Kishwaukee River at Marengo, IL at flood stage?

No — the gage height is 4.40 feet below the NWS flood-stage threshold of 12.0 feet.

What is the historical median flow for the Kishwaukee River at Marengo, IL on June 11?

The long-term median discharge for this date is 104 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 37 to unavailable cfs.

Where is the Kishwaukee River at Marengo, IL stream gauge located?

The Kishwaukee River at Marengo, IL stream gauge is operated by the USGS in McHenry County, IL on the Kishwaukee River. USGS site number 05438170 (coordinates 42.2654, -88.6085).

Kishwaukee River at Marengo, IL

USGS Site No: 05438170 • Kishwaukee River • McHenry County, IL

Kishwaukee River at Marengo, IL on the Kishwaukee River is currently at 64 cfs (Normal — 27th percentile for this date) . Gage height: 7.60 ft.

Reading from 1 week ago

Downstream on Kishwaukee River ↓

Kishwaukee River at Belvidere, IL

CFS Discharge

7.60

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	37
25th	Low threshold	60
50th (Median)	Normal (median)	104	Today: 64 cfs
75th	High threshold	298
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	67	7.64
May 27, 2026	74	7.72
May 26, 2026	82	7.80
May 25, 2026	100	7.98
May 24, 2026	82	7.80
May 23, 2026	72	7.70
May 22, 2026	76	7.73
May 21, 2026	79	7.78
May 20, 2026	83	7.82
May 19, 2026	87	7.86
May 18, 2026	89	7.88
May 17, 2026	93	7.92
May 16, 2026	96	7.95
May 15, 2026	99	7.98
Apr 20, 2026	984	11.01
Apr 19, 2026	1,300	11.42
Apr 18, 2026	1,270	11.38
Apr 17, 2026	1,180	11.27
Apr 16, 2026	1,290	11.41
Apr 15, 2026	788	10.67
Apr 14, 2026	437	9.84
Apr 13, 2026	393	9.63
Apr 12, 2026	423	9.79
Apr 11, 2026	517	10.15
Apr 10, 2026	449	9.91
Apr 9, 2026	459	9.96
Apr 8, 2026	594	10.33
Apr 7, 2026	776	10.69
Apr 6, 2026	991	11.02
Apr 5, 2026	1,310	11.43

Station Information

USGS Site No: 05438170
State: IL
County: McHenry County
Coordinates: 42.2654, -88.6085
Drainage Area: 170 mi²
Datum (ft): 786.1
HUC Code: 07090006

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 11.5 ft
Flood Stage: 12.0 ft

Currently 4.40 ft below flood stage.

Recent Extremes

Max discharge: 1,530 cfs

Apr 4, 2026
Min discharge: 15 cfs

Oct 6, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Kishwaukee River at Belvidere, IL
13.0 mi · 233 cfs

Normal
South Branch Kishwaukee River near Fairdale IL
18.4 mi · 73 cfs

Low
Kishwaukee River Near Perryville, IL
20.6 mi · 570 cfs

Normal
South Branch Kishwaukee River at Dekalb, IL
24.4 mi · 21 cfs

Low
Rock River at Rockton, IL
26.9 mi · 4,690 cfs

Normal