The weather is so warm, what are the clear grammatical elements?

Subject predicate predicate. Sentence formation is called sentence formation, also called syntactic formation. In a sentence with warm and sunny weather, the weather is the subject, the adverbial is warm and the predicate is sunny, so the composition of the sentence is the subject-predicate predicate In a sentence, there is a certain combination relationship between words. According to different relationships, the sentence can be divided into different components.