Well...

https://upload.wikimedia.org/wikipedia/commons/c/c7/Temperat...

Since global warming I guess. When there's a heat wave, Norway is probably one of the worst places on hearth to be. You've got near constant sunlight, there's not much time at night to cool your house.

As I wrote, most of the time it isn't a problem. There's some central heating which gives you a range of temperature, but getting your room cold is much harder than heating it up.

But during summer months, where some cities can hit 30+ degrees (C), that could become uncomfortable. Even worse if you're somewhere humid...20 degrees in high humidity can make you toss and turn all night.

Well, summers are summers. Besides typical eu ac is a thermal pump, you can heat up with it, although even in mediterannean winter it's not quite adequate.