Nichinan experiences a mild climate with distinct seasonal changes. Winters are cool, with temperatures ranging from around -6°C in January to 22°C, averaging around 8-11°C from January to March. As spring approaches, temperatures gradually rise, reaching an average of 15-16°C by April and May, with occasional warm days above 28-32°C. Summers are hot and humid, with temperatures often reaching the mid-30s Celsius in July and August. Autumn brings a welcome respite from the heat, with temperatures dropping to around 7-16°C by October and November, before cooling further into winter.