Hashima, Japan experiences a mild climate with distinct seasonal changes. In winter, temperatures are cool but not cold, ranging from around 0°C in March to -5°C in January and February. Spring brings warm days, often reaching up to 28°C in April and May, while summer is hot and humid, peaking at around 38°C in August. Autumn sees a return to mild temperatures, with cooler evenings and daytime highs rarely exceeding 25°C in November. The temperature swings are relatively moderate throughout the year, with minimal extreme variations.