Abundant Rainfall in the "Mountain Month" of July
Heavy Rainfall in July 2025 Boosts North Rhine-Westphalia's Dam Water Levels
July 2025 witnessed heavy rainfall across Germany, including North Rhine-Westphalia (NRW), providing a much-needed boost to the region's water supply dam levels. The persistent rain and thunderstorms, while not at extreme levels, replenished reservoirs and catchment areas, offering relief during the summer months when demand for water can be high.
According to regional weather data, July 2025 followed seasonal patterns in NRW, with consistent rainfall throughout the month. This steady precipitation would generally increase inflows to dams, improving water supply levels.
In NRW, the average temperature in July was 18.4 degrees Celsius, which was 1.5 degrees higher than usual. Despite the warm start to the month, the weather later showed a more overcast side, bringing showers repeatedly. The number of sunshine hours for NRW in July was slightly above average at 197 hours.
At measuring stations such as Hückeswagen (Bever-Talsperre) and Lindscheid (Große Dhünn-Talsperre), 114 liters of rain per square meter were recorded, which is the average there. However, despite the rain, inflows to the water supply dams remained at a low level.
The Wupperverband, the organisation responsible for managing the water supply in the region, reported that the further drop in water levels in the dams Wupper and Bever-Talsperre has been temporarily slowed down. The release from the water supply dams is an important support for the sensitive ecosystem, and currently, the dam water in the Wupper is being used to maintain the minimum water flow. The supply of raw water to the waterworks is ensured.
The rain was also beneficial for nature, improving the vegetation. At the Solingen-Burg sewage treatment plant, 116 liters were measured, with an average of 111 liters. On the other hand, at the Buchenhofen measuring point, 87 liters were recorded, which is less than the usual 100 liters there.
In conclusion, the heavy rainfall in July 2025 likely had a positive impact on dam water levels in North Rhine-Westphalia by topping up water supply reservoirs during a period known for its significant precipitation. This boost in water levels will provide much-needed relief during the summer months, ensuring a steady water supply for both the ecosystem and the region's inhabitants.
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