Forecast

Rainfall is keeping pollen levels down, but when the sun comes out, grasses become a problem!

Grass flowering has now begun and is causing significant pollution in sunny and dry weather. Although this is not yet fully reflected in the pollen trap data, the increased pollen concentration is clearly noticeable, particularly in the immediate vicinity of meadows. Plantain is also currently flowering in meadows and on roadsides, though corresponding pollen has so far only been detected sporadically in the pollen trap. The first pollen grains from sorrel, which is also in bloom, have, however, already been recorded.

Birch flowering has now finally come to an end in Graz and the lowlands of Styria, as has the pollen dispersal of the plane tree. The flowering season for oak and beech is also already drawing to a close.

In addition, isolated pollen grains from the Brassicaceae family are present in the air. These can cause allergic symptoms, particularly in regions with intensive rapeseed cultivation.

In the urban area, the manna ash is currently in bloom; this tree is frequently planted as a street tree and in gardens. In the mountains, the green alder is also in bloom; individual pollen grains are reaching Graz and the lowlands. At higher altitudes, however, concentrations significant from an allergy perspective may occur.

At present, the seeds of willows and poplars are also in the air. Although these are often perceived as a nuisance, they are harmless from an allergy perspective.

According to the weather forecast, rain and snow are expected to begin in the mountains at midday on Thursday, with conditions set to intensify tomorrow and the day after. Temperatures will also drop significantly in Graz. The precipitation is not expected to stop until Sunday, with temperatures remaining below 20 °C. The precipitation is likely to temporarily reduce pollen counts. However, the extent to which this provides relief for allergy sufferers depends largely on the intensity and duration of the rainfall.

In addition to the pollen types already mentioned, pollen from sour grasses, umbellifers, horse chestnut, elder, legumes, roses and rushes is currently present in the air. However, these have only a low allergenic potential.

Forecast date: 14 May 2026

Note: The data shown here are model data on the expected start of flowering. For more detailed information on expected pollen counts, please refer to the text forecasts.