Autumn's Progress Slows as Warmer Nights Arrive

Unusually early frost nights have made the autumn advance quickly. Meteorological autumn prevails all the way down to western Dalarna – but now the autumn's advance is expected to stop.

» Published: August 26 2025 at 18:35

Autumn's Progress Slows as Warmer Nights Arrive
Photo: Anders Humlebo/TT

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It stops a bit now. It has been chilly nights with minus degrees, but now a little warmer air is coming in, especially at night. So it will probably not go much further down this week, at least, says Fredrik Cronvall, meteorologist at SMHI.

Meteorological autumn prevails from the first day of a continuous five-day period with a daily mean temperature below ten degrees. This means that it is now autumn in northern and western Norrland, but not on the Norrland coast, as well as a bit further down in northwestern Svealand.

It is a bit earlier than usual, says Fredrik Cronvall.

As a result of climate change, autumn otherwise comes later and later, he points out. This year stands out a bit.

If you look at northwestern Dalarna, it is usually at the beginning of September, but now we got it at the end of August. So it is about a week earlier.

During August this year, there has been night frost all the way down to Götaland and it has only happened otherwise during the 2000s in 2007 and 2016.

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By TTEnglish edition by Sweden Herald, adapted for local and international readers
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