Forecast

The ash blossom is progressing in Vorarlberg, soon the birch blossom will begin!

In the coming days, the weather forecast for the region promises sunny to slightly cloudy weather with temperatures between 10 °C and 15 °C. Due to the persistently low night-time temperatures, pollen release will usually only begin in the late morning hours, but the dry conditions over the next few days will allow the pollen count to continue unhindered and reach a moderate to high level.

In the lowlands of Vorarlberg the ash tree is now in bloom. People who are sensitised to this olive tree plant must be prepared for heavy exposure this weekend. Allergy sufferers should also avoid denser stands of these trees, such as those found along running and standing water.

Forsythia, which is currently blooming in gardens and parks, is also an olive tree and is of interest to ash pollen allergy sufferers due to possible cross-reactions. However, as it is mainly pollinated by insects, its pollen is rarely released into the air in large quantities. In order to minimise exposure to allergens, people who are sensitised to olive trees should refrain from using flowering forsythia branches as indoor decoration.

Along Vorarlberg's rivers, streams and lakes, the following are currently in bloom willows and poplars. As both belong to the willow family, cross-reactions can occur in sensitised allergy sufferers. The palm catkins of the willow can also lead to increased exposure in their environment.

In Vorarlberg, the first hornbeams have also reached their flowering stage. Although this tree is not as widespread as other birch plants, pollen allergy sufferers who are sensitised to hazel, alder or birch may experience cross-reactions due to hornbeam pollen.

In climatically favoured locations, such as sunny south-facing slopes or sheltered courtyards, some birches may be ready to flower in the coming days. The impact of these early starters is usually very localised and limited to the area around these specimens.

In the pollen spectrum maple, elm, yew and cypress plants have been detected. In Vorarlberg, the pollen load from these early-flowering plants is low to moderate.

The catkins of the birch are beginning to stretch. From a current perspective, the data from our birch flowering readiness model indicate that flowering readiness will be reached in the second half of March.

Forecast from 2026-03-19

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.