Ishigaki and Yaeyama month by month: JMA temperature, rain and sunshine normals, typhoon approaches, 2025 visitor numbers, and what applies that month (rainy season, typhoons, habu jellyfish, north winds that cancel ferries, Japanese holiday peaks, festivals). Give a month, an interest, or neither for the whole year. Example: "Is October a good time to see manta rays on Ishigaki?"