Forecast

First localised exposure to early bloomer pollen possible!

It should remain dry in Lower Austria until Friday and be quite mild with temperatures above 5 °C. Although the catkins of alder and hazel are largely still closed, in thermally favoured locations such as south-facing slopes, in city parks or courtyards, individual specimens may already be ready to bloom and cause the first localised exposure. ###appende##

The purple alder is actually known for flowering between Christmas and the beginning of January. However, due to the cold temperatures at the beginning of the year, it has not yet reached its full flowering potential. This hybrid of Japanese and Caucasian alder does not occur naturally in Lower Austria, but is often planted as a park or avenue tree in residential areas. Tree and shrub hazels in parks and gardens may also be ready to flower. With the forecast weather conditions, the first localised impacts may occur in residential areas.

Note: The immune system of pollen allergy sufferers can react particularly sensitively at the start of the pollen season. Birch pollen allergy sufferers could also potentially be affected by the pollen count of the "early bloomers" due to cross-reaction.

From a current perspective, the modelling data indicates that flowering readiness will be reached in the first or second half of February.

Forecast date: 2026-02-09

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.