Jefferson River water temperature
Jefferson River, Three Forks, Montana · River
The current water temperature at Jefferson River is 4.9 °C (as of November 6, 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 531 data points since September 7, 2026.
Lowest recorded value: 4.2 °C on October 13, 2026 · highest value: 19.5 °C on September 7, 2026.
In November, temperatures have ranged between 4.5 °C and 7.7 °C.
The current value is 1.2 °C below the November average of this series.
Nearby waters
More measuring points: Jefferson River
Frequently asked questions
Can you swim at Jefferson River right now?
The current water temperature is 4.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Jefferson River?
Currently 4.9 °C (updated continuously).
How warm is at Jefferson River in November?
In November, the water temperature recently averaged 6.1 °C.
When is the water warmest at Jefferson River?
Across the measurement record, September is on average the warmest month (15.4 °C).
