Idioms describing cool weather

Tiān gāo qì shuǎng: tiān gāo qì shuǎng, describing the high and clear sky and the cool and pleasant climate in autumn. As an attributive and clause; to describe autumn. Autumn is high and the air is crisp: qiū gāo qì shuǎng, describing the clear sky and refreshing weather in autumn. As a predicate and attributive; referring to the autumn weather.