Oakashicho's winters are mild, with temperatures rarely dropping below freezing and averaging around 7-10°C. Spring arrives in late March, bringing warmer temperatures that gradually rise to an average of 15-19°C by May. Summer is hot and humid, with July and August often reaching scorching highs above 35°C. Autumn sees a gentle cooling, with October temperatures returning to spring-like averages before dropping again in November. By December, the chill returns, with temperatures averaging around 10°C.