How high is the Fox River at Dayton, IL right now?

The Fox River at Dayton, IL is currently flowing at 1,440 cubic feet per second with a gage height of 6.02 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Fox River at Dayton, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 43th percentile compared to the long-term historical record at this gauge.

Is the Fox River at Dayton, IL at flood stage?

No — the gage height is 5.98 feet below the NWS flood-stage threshold of 12.0 feet.

What is the historical median flow for the Fox River at Dayton, IL on June 11?

The long-term median discharge for this date is 1,690 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 477 to 6,560 cfs.

Where is the Fox River at Dayton, IL stream gauge located?

The Fox River at Dayton, IL stream gauge is operated by the USGS in LaSalle County, IL on the Fox River. USGS site number 05552500 (coordinates 41.3841, -88.7890).

Fox River at Dayton, IL

USGS Site No: 05552500 • Fox River • LaSalle County, IL

Fox River at Dayton, IL on the Fox River is currently at 1,440 cfs (Normal — 43th percentile for this date) . Gage height: 6.02 ft.

Reading from 1 week ago

↑ Upstream on Fox River

Fox River at Yorkville, IL

1,440

CFS Discharge

6.02

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	477
25th	Low threshold	844
50th (Median)	Normal (median)	1,690	Today: 1,440 cfs
75th	High threshold	2,950
95th	Very High threshold	6,560

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	1,570	6.18
May 27, 2026	1,720	6.36
May 26, 2026	1,800	6.45
May 25, 2026	1,800	6.45
May 24, 2026	1,660	6.28
May 23, 2026	1,700	6.33
May 22, 2026	1,780	6.42
May 21, 2026	1,730	6.37
May 20, 2026	1,700	6.33
May 19, 2026	1,890	6.55
May 18, 2026	1,680	6.30
May 17, 2026	1,610	6.22
May 16, 2026	1,730	6.36
May 15, 2026	1,730	6.37
Apr 20, 2026	9,020	11.13
Apr 19, 2026	10,200	11.68
Apr 18, 2026	10,200	11.67
Apr 17, 2026	8,310	10.79
Apr 16, 2026	7,940	10.61
Apr 15, 2026	5,850	9.50
Apr 14, 2026	5,350	9.21
Apr 13, 2026	5,530	9.31
Apr 12, 2026	5,690	9.41
Apr 11, 2026	6,010	9.59
Apr 10, 2026	5,990	9.58
Apr 9, 2026	5,950	9.56
Apr 8, 2026	6,200	9.70
Apr 7, 2026	6,630	9.94
Apr 6, 2026	7,370	10.32
Apr 5, 2026	8,850	11.05

Station Information

USGS Site No: 05552500
State: IL
County: LaSalle County
Coordinates: 41.3841, -88.7890
Drainage Area: 2,642 mi²
Datum (ft): 462.2
HUC Code: 07120007

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 11.0 ft
Flood Stage: 12.0 ft
Moderate Flood: 14.0 ft
Major Flood: 24.0 ft

Currently 5.98 ft below flood stage.

Recent Extremes

Max discharge: 10,900 cfs

Apr 3, 2026
Min discharge: 539 cfs

Oct 6, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Illinois River at Marseilles, IL
5.4 mi · 7,110 cfs

Low
Illinois River at Morris, IL
18.8 mi · 5,290 cfs

Low
Aux Sable Creek Near Morris, IL
23.0 mi · 35 cfs

Low
Mazon River Near Coal City, IL
23.3 mi · 148 cfs

Normal
Fox River at Yorkville, IL
25.3 mi · 953 cfs

Low