bitter cold and fierce heat
A four-character compound (yojijukugo) used to describe extreme temperatures in both winter and summer, often in weather reports or literary descriptions.
This year has been one of bitter cold and fierce heat, making it hard to stay healthy.
In a land of bitter cold and fierce heat, home insulation is crucial.
A yojijukugo combining 酷寒 (bitter cold) and 猛暑 (fierce heat). The exact historical derivation is uncertain, but the compound is transparently formed from these two established words.