There are several synonyms that can be used to describe warm weather. Some of the most popular synonyms include sunny, balmy, temperate, sultry, and hot. "Sunny" is often used to describe clear, warm weather with plenty of sunshine. "Balmy" and "temperate" describe warm weather that is pleasant and comfortable. "Sultry" is a synonym for hot and humid weather, while "hot" describes weather that is excessively warm. Other synonyms for warm weather include tropical, mild, and pleasant. The choice of synonym will depend on the specific context and the intended tone of the text.