Tuolumne River water temperature
Tuolumne River, Lagrange Dam near Lagrange, California · River
The current water temperature at Tuolumne River is 12.1 °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 228 data points since July 23, 2026.
Lowest recorded value: 11.8 °C on July 27, 2026 · highest value: 13.4 °C on August 7, 2026.
In September, temperatures have ranged between 12.0 °C and 13.4 °C.
The current value is 0.4 °C below the September average of this series.
Nearby waters
More measuring points: Tuolumne River
Frequently asked questions
Can you swim at Tuolumne River right now?
The current water temperature is 12.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Tuolumne River?
Currently 12.1 °C (updated continuously).
How warm is at Tuolumne River in September?
In September, the water temperature recently averaged 12.5 °C.
When is the water warmest at Tuolumne River?
Across the measurement record, September is on average the warmest month (12.5 °C).
