Koeln, Germany has a temperate oceanic climate with four distinct seasons. Spring brings blooming trees and increasing pollen counts, particularly from birch, alder, and hazel.
Summer weather in Koeln is generally mild to warm, with occasional heatwaves. Grass pollen is the main allergen during this season, peaking in July.
Autumn in Koeln sees falling leaves and decreasing pollen levels. However, mold spores can still cause allergic reactions. Winter is usually cold and pollen-free, with snow covering the city at times.
When pollen counts are high, we suggest doing these things to help with allergies, especially on windy days when pollen is flying around.