What is the current flow on Big Muddy River?

Big Muddy River was running 156 cubic feet per second as of Aug 1, 2026, 6:30 PM UTC, measured at USGS gauge 05599490. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

What is the water temperature on Big Muddy River?

83.1°F (28.4°C) as of Aug 1, 2026, 6:00 PM UTC, at USGS gauge 05599490. Big Muddy River carries no state trout classification, so the trout-stress thresholds do not apply to it — this is a water temperature measurement, not a fishery judgement.

Big Muddy River

Illinois. Streamflow and water-temperature readings from USGS gauges. Running 156 cfs as of Aug 1, 2026, 6:30 PM UTC.

Latest Reading

156

cubic feet / second

83.1°F

water temperature (28.4°C)

USGS gauges

Flow measured Aug 1, 2026, 6:30 PM UTC at gauge 05599490. Temperature measured Aug 1, 2026, 6:00 PM UTC at gauge 05599490. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on Big Muddy River

Gauge	Station	Water temp?
05595952	BIG MUDDY RIVER BELOW REND LAKE NR BENTON, IL	—
05597000	BIG MUDDY RIVER AT PLUMFIELD, IL	—
05599490	BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL	Yes

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Conditions: USGS NWIS (public domain).