Forecast

It remains changeable, fluctuating conditions for pollen allergy sufferers!

The weather forecast promises a mix of sun and rain for the coming days. The rain will give pollen allergy sufferers a brief period of relief. As soon as the sun comes out again, the pollen count will rise again.

The birch, ash and hornbeam have finished flowering in the lowlands of Styria. There are still flowering specimens of these trees at higher altitudes. From here, pollen can be transported to the lowlands with the right wind currents and cause pollution there.

Also of interest to people who are sensitized to birch, alder and hazel is the current flowering of oaks, beeches and walnuts. Their pollen contains allergens that are similar to those of birch . Due to this similarity, additional stress can occur through cross-reactions in people sensitized to birch plants. Non-native oaks and American walnuts are currently flowering in the Graz Botanical Garden. Both are also related to the birch family and provide additional pollen load in Graz and the surrounding area.

The plane tree is currently flowering and dusting. It is mainly planted as an avenue or park tree. In residential areas, it causes local allergic complaints among sensitized allergy sufferers.

Lilacs bloom in the lowlands of the Mur-Mürz furrow, as well as in the Graz basin and southern Styria. The manna ash, a popular park tree, has also started to bloom. Both are olive trees and can affect allergy sufferers who are sensitized to them. Both are insect-pollinated, i.e. they produce smaller amounts of pollen than the wind-pollinated ash tree. Exposure to these two flowering olive trees is limited to the immediate vicinity of these ornamental trees.

In addition to the trees and shrubs mentioned above, oilseed rape is also in flower. This can cause allergic reactions in people who are sensitized to cruciferous plants.

Although the first flowering grasses have already been reported, widespread flowering is not expected until the beginning of May. Particularly at the beginning, some of the model data still shows a wide range of fluctuation and will only become more reliable as the season progresses. Dock has also started to bloom and is causing additional stress.

The white flakes that can already be seen sporadically in the air are poplar absorbent cotton. It cannot itself cause allergic reactions as it is not pollen but poplar seeds and seed hairs. The flight of poplar absorbent cotton usually coincides with the start of flowering of the grasses.

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

Forecast from 24.04.2025

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.