Denmark faces indoor climate risks due to wetter winters

Increasingly wet winters in Denmark are creating new challenges for indoor climates. Data shows that rainfall in August 2026 was 30 percent higher than in August 2025, a trend the Danish Meteorological Institute (DMI) suggests may continue as the country becomes more rainy.

This shift toward wetter, less snowy winters increases the risk of moisture buildup and mold growth in homes. Bolius has reported a significant rise in inquiries regarding mold over several years. Experts from the cleantech company Brunata advise homeowners to be proactive as temperatures drop.

Morten Duelund, an advisor at Brunata, notes that moisture lingers more easily in homes when heating is not yet active. He recommends maintaining consistent ventilation habits and making small adjustments to household routines to mitigate condensation and mold risks during the autumn and winter months.