Visiting local bars in Toga Onsen is more fun when the weather is good. These rainfall averages and temperatures can help you decide the best time for bar-hopping. The hottest months are usually August and July, with an average temperature of 22°C, while the coldest months are February and January, with an average of 2°C. The rainiest months in Toga Onsen are August, July, October and September, with each month seeing an average of 223 mm of rainfall.