It is thought to be healthy to do so when the weather is changing.

人们认为在天气变化的时候这样做有益健康。

youdao

The weather is changing.

天气要变。

《新英汉大辞典》

Even the weather is changing.

就连天气都变了。

youdao

The weather today is changing.

BBC: Athletes training at Imjin Barracks, Gloucester

Climate is the underlying average, or if the climate is changing it is the underlying trend, whereas weather is the noise in the system.

BBC: Time to spend more money preparing for colder winters?

He calls the Bering Sea his garden, but Tungiyan describes how changing weather is affecting the ice and the ocean.

NPR: Climate Changes Lives of Whalers in Alaska