Weather is probably a major factor when you plan your trip to Otsuki-cho, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 25°C, while the coldest months are January and February, with an average of 10°C. The rainiest months in Otsuki-cho are June, July, September and August, with each month seeing an average of 357 mm of rainfall.