What's the winter climate like in Kumamoto, Japan? I plan to study there from September to March ... PS: What clothes do I need to bring ~

I graduated from Nanjing Institute of Meteorology and have a better understanding of Japanese climate. If you are used to being in a heating room in winter, Kumamoto is a little cold. The average temperature in the coldest January is 4.9℃ day and night, and it is basically around 10℃ during the day. At night, near freezing point. When the strong cold air goes south, it will snow, but it usually melts in a day or two. There is usually no thick snow. The temperature change in winter is generally three cold and four warm, that is, three cold and four warm. There is no central heating system in Japan. Most families or communities use electric stoves or air conditioners for heating. If you exercise properly and pay attention to changing clothes, it is easy to resist cold weather. It should be noted that Kumamoto usually does not enter autumn until the beginning of 10. When I went in September, it was still summer. September is usually warm and humid, sometimes very hot, reaching 35 degrees during the day, and sometimes typhoons cross the border. September is the typhoon season in Japan, and Kumamoto Prefecture is located in the southwest of Japan, facing the sea and bearing the brunt, so you should not only bring an umbrella, but also prepare a raincoat, so be sure to pay attention to safety, because Kumamoto Prefecture is located on the windward slope of the southwest wind, and once a typhoon strikes, it will be very stormy. 10 After autumn, the rain began to decrease obviously and the weather began to get cold. Sunny weather often appears, and then the temperature drops slowly, sometimes sunny and rainy and sometimes humid, until February of the following year. After March, the weather began to get warmer and the rain began to increase. Japan has a maritime monsoon climate with changeable weather and abundant rainfall. Please pay attention to the change of temperature and the mildew resistance of clothes. As for nuclear radiation, don't worry too much. Fukushima is located in the northeast of Honshu Island. Except in August in midsummer, the westerly wind has been blowing in the upper and middle atmosphere in most parts of Japan, and Kumamoto is likely to be polluted by nuclear pollution only when the northeast wind blows in the lower level. However, the two places are more than 2,000 kilometers apart, and radioactive materials have already been diluted to extremely low concentrations. What's more, there is not much time for the Japanese archipelago to blow the northeast wind, and the southwest westerly wind is dominant in northern Japan all the year round. Of course, Japan's public safety system is still very perfect. After going there, we have to learn emergency skills, including, of course, preventing nuclear accidents. That's all. Be sure to pay attention to safety after going to Japan. Good luck!