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Illinois River at Florence water level

River gauge, Illinois River, Illinois, United States

Directions

Right now

Normal for mid-October

Water level

16.83ft Down 0.15 ft over the last 24 hours

Water temperature
67 °F
15 20 25

History

History
152025ftOct 11Oct 12Oct 14Oct 16Oct 17152025ftOct 11Oct 14Oct 17
152025ftSep 18Sep 25Oct 2Oct 10Oct 17152025ftSep 18Oct 2Oct 17
2030ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20262030ftOct 2025Apr 2026Oct 2026
2030ftJanMarMayJulSepNov20262030ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Illinois River at Florence reads 16.83 ft, a normal level for mid-October.

That puts it 0.63 ft above the median of 16.20 ft for mid-October, based on 14 years of readings. A year ago it stood at 14.45 ft (+2.38 ft).

The level is falling, down 0.15 ft over the past 24 hours. Over the past 30 days it has moved between 16.28 ft and 20.85 ft.

Fall is often low-water season on rivers, until steadier rain returns. The sensor also reports a water temperature of 67 °F.

Compared with 14 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
16.20 ft0.63 ft above the median for this date
Normal for this date
14.76 ft – 25.64 ft8 years in 10 fall in this range (14 years of records)
Same day last year
14.45 ft+2.38 ft
Lowest and highest in 30 days
16.28 ft – 20.85 ft
Lowest and highest in 12 months
14.20 ft – 29.94 ft

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

Weather at the gauge

Rain in the last 3 days: 2.99 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 58° 37° – Wind 10 mph
18 Sun 65° 38° – Wind 12 mph
19 Mon 71° 40° – Wind 6 mph
20 Tue 73° 52° – Wind 7 mph
21 Wed 74° 51° – Wind 6 mph
22 Thu 77° 54° – Wind 6 mph
23 Fri 78° 54° – Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:15 AM Sunset 06:22 PM Daylight 11 hr, 7 min First quarter 43%

Map

Other gauges on the Illinois River

Gauge Level Compared with normal 24 hours Distance
Illinois River at MarseillesRiver gauge, Illinois River 11.46 ft Normal −1.02 ft 154 mi
Illinois River at HenryRiver gauge, Illinois River 15.28 ft Normal +0.07 ft 121 mi
Illinois River at Kingston MinesRiver gauge, Illinois River 6.30 ft Normal +0.69 ft 77 mi
Illinois River at Copperas CreekRiver gauge, Illinois River 5.78 ft Normal +0.61 ft 70 mi
Illinois River at MeredosiaRiver gauge, Illinois River 4.98 ft Normal −0.14 ft 14 mi
Illinois River at Valley CityRiver gauge, Illinois River 4.05 ft Normal −0.18 ft 5.2 mi

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
La Moine River at RipleyRiver gauge, La Moine River 5.58 ft Normal −0.07 ft 27 mi
Macoupin Creek near KaneRiver gauge, Macoupin Creek 3.96 ft Normal −0.32 ft 30 mi
Spencer Creek below Plum Creek near FrankfordRiver gauge, Spencer Creek 9.0 cfs Normal ±0 40 mi
Sangamon River near OakfordRiver gauge, Sangamon River 3.46 ft Normal ±0 47 mi
Sangamon River at PetersburgRiver gauge, Sangamon River 4.47 ft Normal +0.07 ft 49 mi
Bear Creek near MarcellineRiver gauge, Bear Creek 2.50 ft Normal +0.09 ft 52 mi

Questions and answers

How does the Illinois River at Florence compare with last year?

It is 2.38 ft higher than on the same day last year, when the reading was 14.45 ft.

What is a normal level for the Illinois River at Florence in mid-October?

The median for mid-October is 16.20 ft. In 8 years out of 10 the reading falls between 14.76 ft and 25.64 ft, based on 14 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Illinois River at Florence today?

On Oct 17, 2026, 02:30 PM CDT, the water level was 16.83 ft. Down 0.15 ft over the last 24 hours.

Is Illinois River at Florence rising or falling?

Down 0.15 ft over the last 24 hours. Down 3.55 ft over the last 7 days.

Is the level of Illinois River at Florence normal?

Normal for mid-October. Compared with 14 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:05586300 (Agency page)
Coordinates
39.63275, -90.60767 (WGS84)
Vertical datum
NAVD88
Update interval
every 15 minutes
Licence
Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Water level 16.83 ft 2026-10-17 19:30 Provisional
Water temperature 67 °F 2026-10-17 19:30 Provisional

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How to cite

U.S. Geological Survey: Illinois River at Florence (usgs:05586300). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-states/illinois/illinois-river-at-florence

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.