Willamette River at Harrisburg, Oregon water temperature
Willamette River at Harrisburg, Oregon · River
The current water temperature at Willamette River at Harrisburg is 18.4 °C (as of September 1, 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 493 data points since July 3, 2026.
Lowest recorded value: 17.5 °C on August 30, 2026 · highest value: 21.8 °C on July 24, 2026.
In September, temperatures have ranged between 18.4 °C and 19.3 °C.
The current value is 0.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Willamette River at Harrisburg right now?
The current water temperature is 18.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Willamette River at Harrisburg?
Currently 18.4 °C (updated continuously).
How warm is at Willamette River at Harrisburg in September?
In September, the water temperature recently averaged 18.8 °C.
When is the water warmest at Willamette River at Harrisburg?
Across the measurement record, July is on average the warmest month (19.8 °C).
