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Vienna sits at the crossroads of Alpine and Pannonian climate influences. The Danube Valley channels cold Alpine air in winter and warm air from the Hungarian Plain in summer, giving Vienna more temperature extremes than Western European capitals. Summer highs reach 28–30°C; winters regularly drop below freezing.
The Föhn — a warm, dry wind from the south — is Vienna's most distinctive ventilation event. It can raise temperatures by 10–15°C in hours, sometimes creating unseasonable warmth even in winter. Föhn days bring excellent air quality and dramatic Alpine views visible from the city. Austrian ventilation culture mirrors Germany's: Stoßlüften (burst ventilation) is the norm over tilted windows left open all day.
Vienna's outdoor air quality is among the best of any European capital (AQI 15–30). Pollen is significant from March through July, with birch, grasses, and late-summer ragweed being the primary concern for allergy sufferers deciding whether to ventilate overnight.
En Wien, los mejores momentos para ventilar son por la mañana temprano (5–8) y después del atardecer, cuando la temperatura exterior baja de la interior.
Sí, en la mayoría de los casos. Abrir las ventanas puede bajar la temperatura interior 2–5°C en 30 minutos si el aire exterior es más fresco.
Por encima del 80% de humedad, abrir ventanas hace el aire pegajoso. Mejor esperar a horas más secas.