。
In northern Europe, winter comes early.
Literal
North-Europe [in-では] winter [of-の] visit [subject-が] early.
北欧 ('Northern Europe, Scandinavia') is a compact two-character compound. 訪れ ('visit, arrival [of]') is the masu-stem of 訪れる ('to visit') used as a noun — poetically used for seasons 'visiting' regions. A literary way to describe seasonal onset.