Weather will likely play an important role when you plan your trip to Owase, 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 24°C, while the coldest months are January and February, with an average of 8°C. The rainiest months in Owase are September, October, June and July, with each month seeing an average of 388 mm of rainfall.