Arkansas River below John Martin Reservoir, Colorado water temperature
Arkansas River below John Martin Reservoir, Colorado · River
The current water temperature at Arkansas River below John Martin Reservoir is 24.0 °C (as of September 1, 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 121 data points since July 8, 2026.
Lowest recorded value: 22.9 °C on August 9, 2026 · highest value: 29.8 °C on August 9, 2026.
In September, temperatures have ranged between 24.0 °C and 25.4 °C.
The current value is 0.6 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Arkansas River below John Martin Reservoir right now?
The current water temperature is 24.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Arkansas River below John Martin Reservoir?
Currently 24.0 °C (updated continuously).
How warm is at Arkansas River below John Martin Reservoir in September?
In September, the water temperature recently averaged 24.6 °C.
When is the water warmest at Arkansas River below John Martin Reservoir?
Across the measurement record, August is on average the warmest month (25.6 °C).
