How high is the Cedar River at Janesville, IA right now?

The Cedar River at Janesville, IA is currently flowing at 1,570 cubic feet per second with a gage height of 2.50 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Cedar River at Janesville, IA normal for this time of year?

Current flow is classified as high for October 28. Today's discharge is at the 85th percentile compared to the long-term historical record at this gauge.

Is the Cedar River at Janesville, IA at flood stage?

No — the gage height is 10.50 feet below the NWS flood-stage threshold of 13.0 feet.

What is the historical median flow for the Cedar River at Janesville, IA on October 28?

The long-term median discharge for this date is 392 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 162 to 2,350 cfs.

Where is the Cedar River at Janesville, IA stream gauge located?

The Cedar River at Janesville, IA stream gauge is operated by the USGS in Bremer County, IA on the Cedar River. USGS site number 05458500 (coordinates 42.6483, -92.4652).

Cedar River at Janesville, IA

USGS Site No: 05458500 • Cedar River • Bremer County, IA

Cedar River at Janesville, IA on the Cedar River is currently at 1,570 cfs (High — 85th percentile for this date) . Gage height: 2.50 ft.

Reading from 4 months ago

↑ Upstream on Cedar River

Cedar River at Waverly, IA

Downstream on Cedar River ↓

Cedar River at Cedar Falls, IA

1,570

CFS Discharge

2.50

Gage Height (ft)

High

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 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	162
25th	Low threshold	249
50th (Median)	Normal (median)	392
75th	High threshold	784
95th	Very High threshold	2,350	Today: 1,570 cfs

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	971	—
May 27, 2026	997	—
May 26, 2026	1,060	—
May 24, 2026	1,140	—
May 23, 2026	1,150	—
May 22, 2026	1,250	—
May 21, 2026	1,340	—
May 20, 2026	1,380	—
May 19, 2026	1,300	—
May 18, 2026	1,170	—
May 17, 2026	1,190	—
May 16, 2026	1,130	—
May 15, 2026	981	—
Apr 20, 2026	2,930	—
Apr 19, 2026	3,480	—
Apr 18, 2026	4,240	—
Apr 17, 2026	5,250	—
Apr 16, 2026	5,520	—
Apr 15, 2026	3,130	—
Apr 14, 2026	2,660	—
Apr 13, 2026	2,640	—
Apr 12, 2026	2,830	—
Apr 11, 2026	3,170	—
Apr 10, 2026	3,710	—
Apr 9, 2026	4,460	—
Apr 8, 2026	5,710	—
Apr 7, 2026	7,680	—
Apr 6, 2026	8,270	—
Apr 5, 2026	8,030	—
Apr 4, 2026	5,550	—

Station Information

USGS Site No: 05458500
State: IA
County: Bremer County
Coordinates: 42.6483, -92.4652
Drainage Area: 1,661 mi²
Datum (ft): 861.0
HUC Code: 07080201

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 10.0 ft
Flood Stage: 13.0 ft
Moderate Flood: 15.0 ft
Major Flood: 18.0 ft

Currently 10.50 ft below flood stage.

Recent Extremes

Max discharge: 14,400 cfs

Aug 21, 2025
Min discharge: 180 cfs

Dec 29, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

West Fork Cedar River at Finchford, IA
4.2 mi · 535 cfs

High
Cedar River at Waverly, IA
6.1 mi · 1,540 cfs

High
Shell Rock River at Shell Rock, IA
7.4 mi · 1,650 cfs

High
Cedar River at Cedar Falls, IA
7.7 mi · 4,010 cfs

Normal
Beaver Creek at New Hartford, IA
9.4 mi · 227 cfs

High