Flathead River at Perma, Montana water temperature
Flathead River at Perma, Montana · River
The current water temperature at Flathead River at Perma is 20.1 °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 170 data points since July 3, 2026.
Lowest recorded value: 16.4 °C on July 3, 2026 · highest value: 25.5 °C on July 31, 2026.
In September, temperatures have ranged between 20.1 °C and 21.3 °C.
The current value is 0.5 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Flathead River at Perma right now?
The current water temperature is 20.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Flathead River at Perma?
Currently 20.1 °C (updated continuously).
How warm is at Flathead River at Perma in September?
In September, the water temperature recently averaged 20.6 °C.
When is the water warmest at Flathead River at Perma?
Across the measurement record, July is on average the warmest month (22.4 °C).
