Forecast

Continued exposure to birch pollen!

Changeable weather conditions are expected in the German capital during the first half of the week, which will have a corresponding effect on pollen levels. On Tuesday, a short-term relief is therefore to be expected before the pollen concentrations are likely to rise again.

Birch pollen is still the main allergen. Although many trees in Vienna have already exhausted a large part of their flowering potential, moderate to high levels are still to be expected in the coming days.

These levels will be exacerbated by other birch trees, which are also still in bloom. Although hornbeam has already passed its peak flowering period, its pollen can still be detected in low concentrations. Pollen from the hop hornbeam is also occasionally registered in Vienna and, like the pollen of other birch plants, can lead to cross-reactions in allergy sufferers.

Caution: Increased desert dust concentrations in the air are to be expected, especially at the beginning of the week. This can further irritate the airways and exacerbate allergic symptoms.

The ash pollen season is coming to an end. Pollen grains are only rarely detected in the urban area and may only cause symptoms in particularly sensitive people.

The plane tree blossom already began in Vienna at the weekend. In the vicinity of larger tree populations, such as along plane tree avenues, it can cause discomfort. Pollen concentrations are expected to reach their peak over the course of the week.

In thermally favoured locations such as sheltered courtyards or parks, the first grasses in bloom. These are very localised occurrences, which can currently only cause minor nuisance in the immediate vicinity. The forecast data for the grass pollen season currently indicates that the grasses will be ready to flower at the beginning of May. These data are still subject to major uncertainties at the beginning of the season and will become more precise over time.

In addition to the pollen types mentioned maple, yew oak, sour grasses and cypress plants are represented in the pollen spectrum. However, they only have a very low potential for allergic stress.

Forecast date: 2026-04-13

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.