Mississippi River water temperature
Mississippi River, Keokuk, Iowa · River
The current water temperature at Mississippi River is 21.2 °C (as of September 22, 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 150 data points since July 25, 2026.
Lowest recorded value: 21.2 °C on September 22, 2026 · highest value: 29.3 °C on September 6, 2026.
In September, temperatures have ranged between 21.2 °C and 29.3 °C.
The current value is 6.3 °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 21.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Mississippi River?
Currently 21.2 °C (updated continuously).
How warm is at Mississippi River in September?
In September, the water temperature recently averaged 27.5 °C.
When is the water warmest at Mississippi River?
Across the measurement record, July is on average the warmest month (28.1 °C).
