"It has rained less this year."

Translation: Det har regnet mindre i år.

[AprilKoskinen]

Why doesn't "Det har regnet mindre dette ar" work here?

[Tardaesel]

You can say that, Duolingo just hasn't accepted it yet, but it is correct

[Martinsspiegel]

I made the same mistake. Guessing it's just how they do it. I dag. I morgen. I år.