Weather is probably a major factor when you plan your trip to Yoshimi, 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 76°F, while the coldest months are January and February with an average of 42°F. The rainiest months in Yoshimi are September, October, July, and June, with each month seeing an average of 7 inches of rainfall.