Forecast

Birch is still responsible for the main allergen!

Thursday will be cloudy and isolated rain showers will pass over our country. But from Friday onwards, the weather will become friendlier again - and the pollen count will pick up again. On Saturday in particular, high levels of allergies can be expected throughout Germany. From Sunday, a disturbance zone will cause a change in the weather, which could bring heavy rainfall and reduce the pollen load.

Birch pollen continues to be the main allergen in the ambient air. Although the peak pollution phase has already been passed in the lowlands of eastern Austria, the pollution levels remain high. In the rest of the country, the pollution peak is probably expected this weekend. As the birch has an above-average density of catkins this year, it can be assumed that the loads will remain at a high to very high level for some time to come.

In addition to birch, other representatives of the birch family such as hornbeam or hop hornbeam release pollen and can cause additional pollution through cross-reactions, as the allergens of these plants are structurally very similar to those of birch.

The ash pollen season is already slowly coming to an end in the east of Austria, while in the west it can continue to cause moderate to high levels of exposure.

Lilacs are beginning to bloom in the lowlands. As a relative of the ash tree, it can also trigger cross-reactions. However, as it is pollinated by insects, the amount of pollen is comparatively low and mainly relevant in the immediate vicinity. Anyone who is sensitive to olive trees should not place flowering branches indoors.

In urban areas, exposure to the plane tree blossom must be expected. Particularly along avenues of plane trees, this can be particularly intense.

In some thermally favoured locations, the first panicle grasses are already appearing. panicle grasses are already in bloom. These are very localised occurrences that can currently only cause minor impacts in the immediate vicinity. The forecast data for the grass pollen season currently indicates that the grasses will be ready to flower at the beginning of May. These data are still subject to major uncertainties at the beginning of the season and will become more precise over time.

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

Forecast date: 2026-04-16

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.