Koja, Japan has a warm and relatively stable climate throughout the year. Winters are mild, with temperatures rarely dropping below 7°C, while springs bring moderate warmth, with highs often reaching 29°C by April. Summers are hot and humid, with July being the warmest month, but even then temperatures don't frequently exceed 34°C. Autumn sees a slight cooling trend, with September still averaging around 29°C, before dropping back down to cooler temperatures in November. The temperature fluctuations between seasons are relatively moderate, with average highs rarely deviating by more than 10°C from the yearly average of around 23-24°C.