Dead Run at Whann Avenue near Mclean, Virginia water temperature
Dead Run at Whann Avenue near Mclean, Virginia · River
The current water temperature at Dead Run at Whann Avenue near Mclean is 20.8 °C (as of September 20, 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 106 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 1.7 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Dead Run at Whann Avenue near Mclean right now?
The current water temperature is 20.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Dead Run at Whann Avenue near Mclean?
Currently 20.8 °C (updated continuously).
How warm is at Dead Run at Whann Avenue near Mclean in September?
In September, the water temperature recently averaged 22.5 °C.
