2025 was “extremely warm” in most of Trøndelag and Northern Norway and “very warm” in Southern Norway, according to a report.
Overall, last year's average Norwegian temperature was 1.5 degrees Celsius above normal, according to measurements comparing the period 1991–2020. A severe heat wave during the summer and an unusually mild winter contributed to the record. On December 22, for example, it was warmer in Svalbard than in Seville, Spain.
"Now we can say that we see the impact of climate change in all weather conditions," Roar Skålin, head of the Swedish Meteorological Institute, said on Wednesday.
The institute's researcher Amalie Skålevåg states that last year's temperatures would have been "almost impossible" to achieve in large parts of Norway just over 100 years ago.
The North Sea also recorded its warmest year ever in 2025, Germany's Maritime and Hydrographic Agency (BSH) announced on Wednesday, according to AFP.
