Pollen Count & Forecast for Cologne

Cologne’s spring allergy season (March-May) is dominated by Birch and Hazel pollen; Birch (Betula) common in the Stadtwald and Rheinpark; Hazel (Corylus) widespread across the urban green belt. Oak (Quercus) contributes significantly from the Königsforst forest. Summer (May-July) sees high Grass (Poaceae) pollen levels, originating from the Rheinwiesen and along Rhine riverbanks.

Low-lying Rhine valley geography and dense urban blocks trap pollen; narrow streets near the Cathedral have high concentrations. Autumn and winter have elevated Mould (Alternaria, Cladosporium) spore counts, from decomposing leaf litter in the Volksgarten and damp river environments.