Forecast

The birch pollen season begins!

The weather conditions at the beginning of the week will favour intensive pollen counts before a cold snap is expected, which will at least temporarily dampen them.

The main culprit for the current pollen count is still the ash. The pollen of this olive tree is registered in moderate to high concentrations in the ambient air and can cause intense symptoms.

But more and more birches are also beginning to release pollen in Vienna. Although not all plants are ready to flower yet, the warm and sunny weather conditions in the coming days are likely to result in moderate or even high levels of birch p ollen. The cold snap will probably cause a temporary interruption in the pollen load, but from the current perspective will not bring temperatures that would cause the catkins to die.

The hornbeam has already reached flowering stage in a number of Viennese parks and can cause additional stress for people who are sensitised to birch pollen through cross-reactions.

In addition to the pollen types mentioned above, maple, yew, poplar and cypress plants are also represented in the pollen spectrum. However, they only have a very low allergenic potential.

Forecast date: 2026-03-23

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.