Allegheny River at Lock & Dam 5 near Freeport, Pennsylvania water temperature
Allegheny River at Lock & Dam 5 near Freeport, Pennsylvania · River
The current water temperature at Allegheny River at Lock & Dam 5 near Freeport is 21.2 °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 146 data points since July 23, 2026.
Lowest recorded value: 21.1 °C on September 18, 2026 · highest value: 25.0 °C on September 5, 2026.
In September, temperatures have ranged between 21.1 °C and 25.0 °C.
The current value is 1.8 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Allegheny River at Lock & Dam 5 near Freeport right now?
The current water temperature is 21.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Allegheny River at Lock & Dam 5 near Freeport?
Currently 21.2 °C (updated continuously).
How warm is at Allegheny River at Lock & Dam 5 near Freeport in September?
In September, the water temperature recently averaged 23.0 °C.
When is the water warmest at Allegheny River at Lock & Dam 5 near Freeport?
Across the measurement record, July is on average the warmest month (23.7 °C).
