What the body feels, the mind thinks (reflects). People with high humidity have heavier rainy days, which leads to suffocation and breathlessness. After a long time, you take this seriously and even hate rainy days, so you have this dream. If you are impressed not by the rain, but by taking a hot bath, then your dream may be to take a bath.
My answer is different from ordinary people, but it conforms to the laws of Huangdi's Neijing, Treatise on Febrile Diseases and Psychology. I don't believe you go to see a Chinese doctor. Of course, doctors in China have different levels and different understandings, so don't test my answer.