American River below Folsom Dam near Folsom, California water temperature
American River below Folsom Dam near Folsom, California · River
The current water temperature at American River below Folsom Dam near Folsom is 18.8 °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 143 data points since July 21, 2026.
Lowest recorded value: 14.5 °C on August 3, 2026 · highest value: 19.3 °C on July 31, 2026.
In September, temperatures have ranged between 17.5 °C and 19.1 °C.
The current value is 0.2 °C above the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at American River below Folsom Dam near Folsom right now?
The current water temperature is 18.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at American River below Folsom Dam near Folsom?
Currently 18.8 °C (updated continuously).
How warm is at American River below Folsom Dam near Folsom in September?
In September, the water temperature recently averaged 18.6 °C.
When is the water warmest at American River below Folsom Dam near Folsom?
Across the measurement record, September is on average the warmest month (18.6 °C).
