Ohio River water temperature
Ohio River, Olmsted, Illinois · River
The current water temperature at Ohio River is 29.2 °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 155 data points since July 23, 2026.
Lowest recorded value: 26.4 °C on August 28, 2026 · highest value: 30.3 °C on August 15, 2026.
In September, temperatures have ranged between 27.5 °C and 30.0 °C.
The current value is 0.2 °C above the September average of this series.
Nearby waters
More measuring points: Ohio River
Frequently asked questions
Can you swim at Ohio River right now?
The current water temperature is 29.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ohio River?
Currently 29.2 °C (updated continuously).
How warm is at Ohio River in September?
In September, the water temperature recently averaged 29.0 °C.
When is the water warmest at Ohio River?
Across the measurement record, July is on average the warmest month (29.5 °C).
