Planning for the weather is an important factor for making your trip to Futatsuimachi a success, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 21°C, while the coldest months are February and January, with an average of 1°C. The rainiest months in Futatsuimachi are August, July, September and October, with each month seeing an average of 236 mm of rainfall.