Subtropical

[Becky]

belonging to or relating to parts of the world that are immediately south or north of the tropics (= the hottest areas) and have very hot weather at some times of the year:

[Kai]

of or characteristic of the areas bordering the tropics (= hottest area of the earth)

[Justin Bieber]

Relating to or characteristic of the regions adjacent to or bordering on the tropics.