Big Muddy River water temperature
Big Muddy River, RTE 127 at Murphysboro, Illinois · River
The current water temperature at Big Muddy River is 28.0 °C (as of September 21, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 161 data points since July 23, 2026.
Lowest recorded value: 27.0 °C on August 3, 2026 · highest value: 34.0 °C on September 5, 2026.
In September, temperatures have ranged between 27.7 °C and 34.0 °C.
The current value is 1.7 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Big Muddy River right now?
The current water temperature is 28.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Big Muddy River?
Currently 28.0 °C (updated continuously).
How warm is at Big Muddy River in September?
In September, the water temperature recently averaged 29.7 °C.
When is the water warmest at Big Muddy River?
Across the measurement record, September is on average the warmest month (29.7 °C).
