What should I do if I miss my connecting flight because of the late weather?

Is it a joint ticket? It doesn't matter if it's a joint ticket. The airline will be responsible for changing your next flight for free.

The connecting ticket can be connected by several different airlines, but it doesn't mean that any two airlines can be connected, depending on the specific situation. Please be sure to consult your ticket sales agent.

If it's not a joint ticket, I'm sorry. In this case, you must bear the loss yourself and buy a new air ticket. If it is confirmed that the first paragraph will be delayed, you can refund the ticket in advance or change the ticket in the latter paragraph, but many discounted tickets do not accept refund or change, please also confirm with the ticket sales agent.