noun
subtemperate zone
Technical term used in climatology and geography to describe a climate zone that is nearly temperate but slightly cooler or transitional.
この地域は亜温帯に分類される。
This region is classified as a subtemperate zone.
亜熱帯 is the subtropical zone, which is warmer than the subtemperate zone.
Compound of 亜 (sub-, near-) and 温帯 (temperate zone).