Pollen and allergies — Banja Luka
Banja Luka, in the Vrbas river valley in northwestern Republika Srpska, is surrounded by hills and forests. A continental climate with cold winters and warm summers favors a diverse pollen season — from early spring flowering of alder and hazel to summer grasses and late-summer ragweed.
Main allergens and season
- Winter and early spring (February–April): alder along the Vrbas and hazel, then birch from the surrounding hills and forests — often the main spring allergen in the valley.
- Late spring and summer (May–July): grasses from the meadows and pastures in the Vrbas valley.
- Late summer (August–September): ragweed, especially around agricultural land and roads.
Banja Luka does not have its own measuring station on this service, so the displayed forecast is based on the European CAMS model (via Open-Meteo) — the values are modeled, not measured, but a useful guide for planning outdoor activities.