Weather is probably a major factor when you plan your trip to Hanamaki, and keep 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 temp of 67°F, while the coldest months are January and February with an average of 29°F. The rainiest months in Hanamaki are July, August, September, and October, with each month seeing an average of 7 inches of rainfall.