Unprecedented heat surpasses previous records at Mülheim weather station.
In the heart of Germany, the city of Mülheim an der Ruhr has recently witnessed a significant weather event. On Wednesday, a new heat record was reached at the municipal weather station, with the temperature soaring to an astonishing 40.7°C. However, the search results do not provide specific data on the current heat records for Mülheim or detailed information on the urban heat island effect as it relates to the city's temperatures compared to its surroundings.
While Mülheim, like many European cities, experiences typical continental climate conditions, the urban heat island (UHI) effect is a factor that likely contributes to the city's higher temperatures compared to surrounding rural areas. The UHI phenomenon occurs due to the abundance of concrete, asphalt, and buildings in urban areas like Mülheim, which absorb and retain heat, leading to higher local temperatures.
The weather station in Mülheim that recorded the new heat record is located on Heinrich-Melzer-Straße and has been operational since 2005. This station, maintained by the Mülheim Environmental Agency since 1997, records not only temperatures but also precipitation amounts, wind speeds, and average daily temperatures. The previous heat record at this station was 39.8°C, measured on July 25, 2019.
It's worth noting that the weather station in Mülheim is not part of the "high-density urban area" and therefore may not exhibit the same heat island effect as the station near the health department. In contrast, the station near the health department, which did not reach the new heat record, is classified as part of the "high-density urban area" and exhibits a strong heat island effect, meaning it gets particularly hot compared to the outskirts of the city.
Interestingly, Mülheim also has a mobile sensor in operation in the city center. This sensor, operated by the Mülheim Environmental Agency, is not the official weather station of the German Weather Service and is not taken into account for nationwide heat records. On Wednesday, the mobile sensor in the city center showed 38°C, suggesting that the city center may have experienced temperatures close to the record-breaking heat.
While the exact current heat records for Mülheim in 2025 are not available in the provided sources, it can be inferred that the average temperature in Mülheim could exceed the highest value recorded so far (29.5°C) on Wednesday. For those seeking exact temperature records or scientific studies on Mülheim’s heat island effect, local meteorological agencies or environmental research institutions would be the best sources.
Weather forecasting for Mülheim an der Ruhr should take into account the urban heat island effect, a phenomenon that likely contributes to the city's higher temperatures compared to surrounding rural areas. The mobile sensor in the city center, operated by the Mülheim Environmental Agency, provides additional local temperature data that could be valuable for future weather-forecasting models.
