Forecast

The birch blossom is followed by the grasses!

In the coming days, the sun will be shining brightly, as it did at the weekend, and it will remain fairly mild with temperatures between 15 and 20 degrees Celsius. The conditions are therefore ideal for pollen counts. However, as we are currently at the transition from the birch- into the grass season season, it is unlikely that allergy sufferers will experience peak pollen counts in the coming days.

Most birch trees have exhausted their flowering potential and are already shedding their catkins. They therefore only have a low potential for allergic reactions. However, since beech and oak are also still in bloom, there may be additional exposure due to cross-reactions.

The blossom of the plane tree has also largely come to an end. Pollen concentrations that exceed the threshold for allergic reactions are only expected along plane tree avenues or in parks.

On the other hand, the first tussock, foxtail and panicle grasses, which can cause localised discomfort, are already being sighted in urban areas and the surrounding areas of Vienna. However, widespread flowering is not yet expected in the forecast period. A good indication of the imminent start of the grass pollen season is the poplar cotton wool, which is also increasingly flying. This is the seed of the poplarwhich is usually released when the grass pollen season is in the starting blocks.

In addition ash pollen is also registered in the air again. This exposure is due to the currently flowering manna ash trees and can again lead to symptoms in people who are sensitised to the pollen of the olive tree plants . Similar to the lilac , which is also in flower, the manna ash is a plant that is mainly pollinated by insects. As a result, its pollen can usually only be found in the air in relevant concentrations in the immediate vicinity of the plants.

In the area surrounding Vienna, the rapeseed fields are in bloom. In order to avoid possible symptoms, pollen allergy sufferers should avoid close proximity to these fields.

In addition to the pollen types mentioned, spruce, pine, larch, mulberry and horse chestnut are also currently in the air, horse chestnutsour grasses, fir,walnut and cypress plants are represented in the pollen spectrum. However, they only have a very low allergenic potential.

Forecast date: 2026-04-27

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.