Trondheim, Norway has cool, wet weather with temperatures rarely exceeding 20°C (68°F). Summers are short and winters can be long with snowfall.
The pollen season in Trondheim is generally mild due to the cool climate. Tree pollen, particularly birch, is highest in May. Grass pollen peaks in late June and early July.
The climate in Trondheim is oceanic, with the Gulf Stream keeping temperatures moderate. Rain is common year-round, which can help limit the spread of pollen, making the allergy season less severe than in drier climates.
When pollen counts are high, we suggest doing these things to help with allergies, especially on windy days when pollen is flying around.