Idioms about sunny weather

The sky is clear and the air is clear

Pinyin: tiān lǎng qì qīng

Explanation: Lang: clear. Describes the clear sky and fresh air.

Example: On that day~, the wind and clouds are prosperous, it is a prosperous period, and the scene of peace is naturally very different. (Chapter 98 of Xu Zhonglin's "The Romance of the Gods" in the Ming Dynasty)