Osaki, Japan experiences a continental climate with distinct seasonal variations. Winters are cold and snowy, with temperatures often below freezing in January and February, but occasionally rising into the mid-teens. As spring approaches, temperatures gradually warm up, reaching averages of around 11°C by April and 17°C by May. Summers are hot and humid, with July and August seeing highs above 35°C and lows rarely dipping below 18°C. Autumn brings mild temperatures, ranging from 4-20°C, before the winter chill returns in December.