Ahauser Aa water temperature
Ahauser Aa, Haarmuehle · River
The current water temperature at Ahauser Aa is 16.5 °C (as of September 20, 2026, source: LANUV NRW).
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 468 data points since July 22, 2026.
Lowest recorded value: 16.1 °C on September 12, 2026 · highest value: 23.0 °C on August 5, 2026.
In September, temperatures have ranged between 16.1 °C and 19.2 °C.
The current value is 1.2 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Ahauser Aa right now?
The current water temperature is 16.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ahauser Aa?
Currently 16.5 °C (updated continuously).
How warm is at Ahauser Aa in September?
In September, the water temperature recently averaged 17.7 °C.
When is the water warmest at Ahauser Aa?
Across the measurement record, August is on average the warmest month (19.4 °C).
