Forecast

Sunny weather, pollen allergy sufferers must be prepared for high levels of stress!

From Liezen to Leibnitz, the dry and sunny weather of the past few days has boosted the pollen count. It will remain mostly sunny and warm in Styria for the next few days. The probability of thunderstorms will increase from Saturday and widespread precipitation is expected from Monday. There may be increased allergic reactions before thunderstorms. Pollen allergy sufferers must be prepared for moderate to high levels in the coming days.

Only a few birch, ash and hornbeam trees are still in bloom at higher altitudes. From here, pollen can be transported to valley locations by suitable wind currents and pollute there.

The oaks, beeches and walnuts, which are now in full bloom, are important for people who are sensitized to birch plants. Because they are related to the birch family, their pollen can cause cross-reactions. In the area around Graz, the beech trees have already completed their main flowering period and are only slightly to moderately polluting. In the Graz Botanical Garden, the non-native oaks and American walnuts are still in bloom. Both are also related to the birch family and provide additional pollen load in Graz and the surrounding area.

The flowering period of the plane tree is also coming to an end. This popular avenue or park tree only causes low levels of pollution in residential areas.

For allergy sufferers who are sensitized to ash or olive trees, the current flowering of lilac and manna ash is important. Although both produce less pollen than the common ash, as they are pollinated by insects, allergy sufferers may experience symptoms in the direct vicinity of or in contact with these ornamental trees.

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

Some grass species are already flowering in the meadows of southern Styria and can already reach moderate to high pollen concentrations locally. The widespread start of flowering is expected at the beginning of May (see flowering start model). In the meadow aspect, dock and plantain have also started to flower. Both provide additional pollen load.

The white flakes that can already be seen sporadically in the air are poplar absorbent cotton. It cannot 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, pine, mulberry, roses, horse chestnut, sour grasses and cypresses. These are of minor allergological importance.

Forecast from 01.05.2025

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.