When you're planning your trip to Yuwaku Onsen, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are January and February, with an average of 4°C. The rainiest months in Yuwaku Onsen are July, September, August and December, with each month seeing an average of 288 mm of rainfall.