Tongue River at State Line near Decker, Montana · River
The current water temperature at Tongue River at State Line near Decker is 29.4 °C (as of July 17, 2026, source: USGS).
Can you swim at Tongue River at State Line near Decker right now?
The current water temperature is 29.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Tongue River at State Line near Decker?
Currently 29.4 °C (updated continuously).
How warm is at Tongue River at State Line near Decker in July?
In July, the water temperature recently averaged 27.1 °C.