Warm or mild (usually of climate); temperate or mild in nature (used as a na-adjective).
温暖な地域では様々な作物が育ちやすい。
A warm region is conducive to growing a variety of crops.
近年は温暖化の影響で季節感が変わってきた。
In recent years, seasonal patterns have changed due to warming (global warming).
温暖な気候が観光客を引きつける。
A mild climate attracts tourists.