It's extremely cold. Is it a sick sentence?

is not a sick sentence. Because the weather is too cold, everyone can understand this sentence. Some people may say: the weather will not feel cold, only the temperature is low, people feel cold, but I think there is no need to get into a dead end, as long as everyone can understand, sentences that do not cause misunderstanding can not be counted as sick sentences. After all, the main function of speaking is communication between people, as long as the purpose of communicating and transmitting information is achieved, there is no need to be too old-fashioned.