Dead Run water temperature
Dead Run, Whann Avenue near Mclean, Virginia · River
The current water temperature at Dead Run is 21.1 °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 89 data points since August 27, 2026.
Lowest recorded value: 19.7 °C on September 8, 2026 · highest value: 26.1 °C on September 2, 2026.
In September, temperatures have ranged between 19.7 °C and 26.1 °C.
The current value is 1.8 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Dead Run right now?
The current water temperature is 21.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Dead Run?
Currently 21.1 °C (updated continuously).
How warm is at Dead Run in September?
In September, the water temperature recently averaged 22.9 °C.
