Using the thesaurus:
warm adjective
fairly hot in a way that is comfortable and pleasant
hot adjective
very high in temperature
burning adjective
very hot
boiling adjective
extremely hot
mild adjective
mild weather is warm and pleasant, especially warmer than usual for the time of year
balmy adjective
warm and pleasant
tropical adjective
used about weather that is very hot, especially when the air also feels slightly wet
red-hot adjective
extremely hot
scorching adjective
extremely hot
scalding adjective
very hot