Cheyenne River water temperature
Cheyenne River, Red Shirt, South Dakota · River
The current water temperature at Cheyenne River is 16.9 °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: 16.9 °C on September 21, 2026 · highest value: 28.6 °C on July 29, 2026.
In September, temperatures have ranged between 16.9 °C and 27.8 °C.
The current value is 6.0 °C below the September average of this series.
Frequently asked questions
Can you swim at Cheyenne River right now?
The current water temperature is 16.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Cheyenne River?
Currently 16.9 °C (updated continuously).
How warm is at Cheyenne River in September?
In September, the water temperature recently averaged 22.9 °C.
When is the water warmest at Cheyenne River?
Across the measurement record, July is on average the warmest month (27.0 °C).
