Forecast

High loads, even at the weekend!

According to the weather forecast, there are a few days ahead with many hours of sunshine and spring-like temperatures. This means ideal conditions for the pollen count and consequently high levels of stress for allergy sufferers.

The main reason for this is currently the alder blossom. Grey alder and black alder are currently causing high pollen concentrations in the ambient air. Many hazels, on the other hand, have already largely exhausted their flowering potential and are only contributing to moderate pollen counts. Allergy sufferers who are sensitised to pollen from early-flowering plants should nevertheless continue to avoid the vicinity of riparian forests or bodies of water, as larger populations of alder are often found there and peak levels can be expected locally.

In addition, the first ash trees are now ready to bloom in thermally favoured locations and can already cause local pollution. However, it will be some time before the pollen of this olive tree plant causes widespread complaints.

However, the development of the pollen spectrum is not yet complete: As every year, the early bloomers are followed by the next big wave of pollution, the birch blossom. Our models currently suggest that flowering readiness could be reached between the middle and end of March. The phenological observations do not yet give cause for concern: The catkins are still closed, but occur in above-average density on the reference plants.

In addition to the pollen types mentioned above, the following are also represented in the pollen spectrum: Elm, yew and cypress. However, they only have a very low potential for allergic stress.

Forecast date: 2026-03-05

Note: The data shown here are model data for the expected start of flowering. For more detailed information on the expected pollen count, please refer to the text forecasts.