Forecast

Sun and rain alternate and make for fluctuating pollen loads!

The end of the tree pollen season was heralded by the heavy rainfall of the last few days. Now the herbaceous allergenic plants are taking over the main role in the pollen spectrum. The weather remains unstable. Rainy phases may mean relief for pollen allergy sufferers, but as soon as the sun comes out again, an increase in exposure is to be expected.

For allergy sufferers who are sensitized to birch plants, the green alder is important. It is native to higher altitudes and can cause intense pollen counts there. In sunny phases and with suitable wind conditions, green alder pollen can be transported to the lowlands and can also be a nuisance there.

The peak of beech, oak and walnut flowering is over in Vorarlberg. These plants, which are related to birch, hazel and alder, can cause additional stress in people who are sensitized to birch plants through cross-reaction.

Lilacs are important for allergy sufferers who are sensitized to olive trees. As it is pollinated by insects, symptoms are only to be expected in the immediate vicinity or on contact.

Note: A yellowish film can currently be found on the surface of many varnishes. This is pollen from conifers such as spruce, pine and fir trees, which is often deposited as a yellow film on car roofs or window sills. From an allergological point of view, it is not a cause for concern.

The grasses are now in full bloom. Flowering smooth oats, bluegrass and tufted grasses can be found in the meadows. Dock and plantain are also flowering and polluting.

Other types of pollen in the ambient air: elderberry, mulberry, roses, horse chestnut, sour grasses and cypress. These are of minor allergological importance.

Forecast from 08.05.2025

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.