The weather in Beijing in winter is colder than _ _ _ _. ?

Pay attention to the difference between specific reference and general reference. It refers to the same thing, and that refers to a kind of thing.

Obviously, we should use a general reference here, because the weather in Beijing and Guangzhou are two different things, but they are the same.

Because weather is an uncountable noun, it is replaced by THAT.

Come on! Ask again if you don't understand! If I can help you, please adopt it. Thank you! , 1, hello. This sentence of yours is a typical mistake. Where did it come from?

The correct expression is:

Beijing is much colder than Guangzhou in winter.

This is an English idiom that refers to the weather, although people can understand your sentence with the weather as the subject. 1, c just agrees with the previous one, which is meaningless. 1, the weather in Beijing is worse than that in winter.

The water in Guangzhou