San Juan River at Four Corners, Colorado water temperature
San Juan River at Four Corners, Colorado · River
The current water temperature at San Juan River at Four Corners is 19.7 °C (as of September 4, 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 115 data points since July 7, 2026.
Lowest recorded value: 18.3 °C on September 1, 2026 · highest value: 28.6 °C on July 27, 2026.
In September, temperatures have ranged between 18.3 °C and 22.6 °C.
The current value is 0.6 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at San Juan River at Four Corners right now?
The current water temperature is 19.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at San Juan River at Four Corners?
Currently 19.7 °C (updated continuously).
How warm is at San Juan River at Four Corners in September?
In September, the water temperature recently averaged 20.3 °C.
When is the water warmest at San Juan River at Four Corners?
Across the measurement record, July is on average the warmest month (24.9 °C).
