Mississippi River water temperature
Mississippi River, DAM 13 near Fulton, Illinois · River
The current water temperature at Mississippi River is 19.3 °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 162 data points since July 24, 2026.
Lowest recorded value: 19.3 °C on September 21, 2026 · highest value: 29.0 °C on September 5, 2026.
In September, temperatures have ranged between 19.3 °C and 29.0 °C.
The current value is 6.9 °C below the September average of this series.
Nearby waters
More measuring points: Mississippi River
Frequently asked questions
Can you swim at Mississippi River right now?
The current water temperature is 19.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Mississippi River?
Currently 19.3 °C (updated continuously).
How warm is at Mississippi River in September?
In September, the water temperature recently averaged 26.2 °C.
When is the water warmest at Mississippi River?
Across the measurement record, July is on average the warmest month (27.3 °C).
