About Trondheim, Trondelag's Climate & Weather History

With a population of around 217,000, Trondheim sits in Trondelag, Norway. The city operates in the Europe/Oslo time zone.

In 2025, Trondheim recorded an average annual temperature of 45°F. The hottest temperatures reached 90°F in July; the coolest were 9°F in January. Total precipitation for the year was 59 inches, with the wettest month being March. Snowfall for the year totaled approximately 26 inches.