Warmest spring ever recorded in Eastern Norway

A new report from the Norwegian Meteorological Institute shows that both Eastern Norway and Agder, along with ten counties (based on the former county structure), experienced their warmest spring ever recorded.

Eastern Norway recorded temperatures 2.6 degrees above normal, while Agder was 2.4 degrees above. Both regions surpassed their previous records, which were set just last year.

The normal refers to the average temperature during the period 1991-2020.

Nationally, the 2025 spring season was 1.6 degrees above normal. This makes it the second warmest recorded since measurements began in 1901.

"The five warmest spring seasons we've recorded have all come after the year 2000," says Ketil Tunheim, climate researcher at the Norwegian Meteorological Institute.

Of the ten counties that set new heat records for the spring, Buskerud stands out with 2.9 degrees above normal. The previous record was 1.8 degrees above normal and was set in 2014.

"Buskerud has broken its record by over a degree. We recalculated to be absolutely sure, and such a large leap is something I haven't seen before in a seasonal record," explains Tunheim.

The other counties that broke records were:

• Aksershus (+ 2.4°C)
• Oslo (+ 2.3°C)
• Hedmark (+ 2.6°C)
• Oppland (+ 2.4°C)
• Vestfold (+ 2.2°C)
• Aust-Agder (+ 2.5°C)
• Vest-Agder (+ 2.3°C)
• Hordaland (+ 2.3°C)

In Troms, Finnmark and Nordland north of Bodø, temperatures were close to the seasonal average

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Translated by Alette Bjordal Gjellesvik

Read the Norwegian version of this article on forskning.no

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