Sun at its peak, summer in full swing
Heatwave and Pollen Forecast in Germany 2025
Germany experienced four distinct heatwaves during the summer of 2025, with the first occurring from June 17 to June 22, the second from June 27 to July 2, the third from July 9 to 15, and the fourth from August 11 to 17 [2]. The peak temperatures during these waves reached around mid-30s Celsius, with some forecasts peaking near 35°C in early August [3][5].
As the summer progressed, the heatwaves started to subside. By mid-August, cooler air started breaking the heatwaves, reducing peak temperatures while keeping summer conditions ongoing [5].
Regarding pollen forecasts, particularly for mugwort and ambrosia (ragweed), while the search results do not provide specific data for 2025, typically late summer (July through August) is the peak pollen season for these plants in Germany. Ambrosia pollen is known for causing allergic reactions during late summer and early fall, coinciding with the heatwaves observed in August [known seasonal patterns].
In the north and east of Germany, the mugwort bloom reaches its peak. Particularly in the Lusatia region, moderate concentrations of Ambrosia pollen can be expected. The pollen count of dock is low to moderate, while the pollen count of grasses is low.
Looking ahead, highest temperatures of 32 to 36°C are expected, with peak values up to 38°C possible in some areas. At the coming weekend, there will be hardly any showers or thunderstorms.
In summary, while the heatwaves in Germany have started to subside, temperatures remain high, and the risk of showers and thunderstorms is low. It is essential for those sensitive to pollen to be aware of the typical peak pollen season for plants like mugwort and ambrosia, even though specific forecasts for 2025 were not found in the search results.
Other environmental sciences indicate that the peak pollen season for mugwort and ambrosia typically falls in late summer, overlapping with the observed heatwaves in August. Despite no specific forecasts for 2025, these heatwaves might have contributed to increased pollen levels in the environmental-science data of subsequent seasons.
