Casselman River at Markleton, Pennsylvania water temperature
Casselman River at Markleton, Pennsylvania · River
The current water temperature at Casselman River at Markleton is 19.4 °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 150 data points since July 23, 2026.
Lowest recorded value: 18.3 °C on September 7, 2026 · highest value: 27.3 °C on September 2, 2026.
In September, temperatures have ranged between 18.3 °C and 27.3 °C.
The current value is 2.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Casselman River at Markleton right now?
The current water temperature is 19.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Casselman River at Markleton?
Currently 19.4 °C (updated continuously).
How warm is at Casselman River at Markleton in September?
In September, the water temperature recently averaged 21.8 °C.
When is the water warmest at Casselman River at Markleton?
Across the measurement record, July is on average the warmest month (22.3 °C).
