Difficult Run above Fox Lake near Fairfax, Virginia water temperature
Difficult Run above Fox Lake near Fairfax, Virginia · River
The current water temperature at Difficult Run above Fox Lake near Fairfax 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 102 data points since August 27, 2026.
Lowest recorded value: 19.8 °C on September 8, 2026 · highest value: 25.7 °C on September 4, 2026.
In September, temperatures have ranged between 19.8 °C and 25.7 °C.
The current value is 1.7 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Difficult Run above Fox Lake near Fairfax 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 Difficult Run above Fox Lake near Fairfax?
Currently 20.8 °C (updated continuously).
How warm is at Difficult Run above Fox Lake near Fairfax in September?
In September, the water temperature recently averaged 22.5 °C.
