Pollen is an important source of allergens in the natural environment, and the cause of the appearance of symptoms of allergic disease in hypersensitive individuals. In our laboratory, we monitor 60 types of pollen of various allergenic potential, and publish the results of measurements from different phytogeographical areas in Slovenia. Data on daily concentrations, together with many years of experience, are the basis for making short-term forecasts about pollen air pollution.

Pollen calendar in Slovenian language is available here.

Pollen forecast

Forecast from August 13 to August 20, 2025

In the lowlands, the main ragweed pollen season is underway. In northeastern Slovenia, high concentrations are already being recorded, elsewhere the levels are moderate but may rise quickly. The mugwort season is in full swing, with pollen concentrations expected to be moderate to locally high.

In the lowlands, low summer levels of grass and plantain pollen will continue. Pollen from the hemp family, sorrel, and goosefoot family will also be in the air, along with higher quantities of nettle pollen, whose allergenicity is low and rarely affects health.

In the coastal region, pollen from the nettle family (nettle and pellitory) will dominate, the loads will be moderate to occasionally high. Ragweed pollen levels will be low. Pollen from mugwort, grasses, plantain, and the hemp and goosefoot families will also be present.

The fungal spore load is high. Important allergenic genera are Cladosporium and Alternaria, although other species may also trigger allergic reactions in sensitive individuals. The loads increase during mowing and field work.

Write to pelodinfo@nlzoh.si for more information.