Idioms describing autumn weather

There are many idioms describing autumn weather, such as:

Blue sky: describes sunny weather.

Autumn is high and harmonious: it describes the crisp autumn and sunny weather.

The sky is high and the clouds are light: the weather is fine, and the sky clouds are few and high, thin and light. Refers to the autumn sky.

Crisp autumn air: describe the crisp autumn air in Wan Li.

Autumn wind blow gently: the warm autumn wind blows slowly.