How to talk about the weather topic

Talking about the weather generally takes place in the following three contexts.

Simple greetings;

Stir up conversation, break the silence and lead to other topics;

Once there is an embarrassing situation, or other topics are unsustainable, it is used to "pass the time", "fill the embarrassment" or "shift the focus".

Today we are going to learn a sentence:

Nice day, isn't it? Nice day, don't you think?

Use context:

Kevin: Nice day, isn't it?

What a beautiful day, don't you think?

Li: Of course. Why don't we go to the park?

That's right. Shall we go to the park?

Kevin: Good idea!

Good idea!