In March, numerous regions across Germany experienced significantly higher average solar radiation levels compared to long-term averages, with the western part of the country basking in particularly abundant sunshine.
According to measurements by the German Weather Service (DWD), the average solar radiation in Germany in March 2025 reached 101 kWh/㎡. This figure far exceeds the average solar radiation value for the period from 1981 to 2010 and is also higher than the historical average for March, which stands at 75 kWh/㎡.
It is reported that the Alpine region typically boasts the highest long-term average solar radiation in March, with values reaching up to 115 kWh/㎡. However, the maximum solar radiation recorded this March was 113 kWh/㎡, and it did not occur in the Alpine region but rather in areas around Emden, Nordhausen, and the vicinity of Saarland.
It can be said that the entire western part of Germany was bathed in sunshine. In Saarland, Rhineland-Palatinate, North Rhine-Westphalia, Lower Saxony, Hesse, Bremen, and Saxony-Anhalt, the DWD measured solar radiation levels per square meter ranging from 100 to 110 kWh/㎡. The long-term average for these regions is 66 to 80 kWh/㎡.
Extremely high irradiation values were also observed in southern Baden and near Passau. Although the irradiation values in the eastern regions were not as high as those in the west, they were still significantly above the usual levels.
It is understood that the regions with the lowest solar radiation in March are typically located in northern Germany, with only 66 kWh/㎡ per square meter. This year, the Alpine region, the Swabian region, and the Baltic coast saw the lowest solar radiation, but sunlight was more abundant across all areas compared to previous years.
