You see, when we heard Fukuoka had a rainy season, we assumed it was the same time as the rainy season in Korea, which after all is only a 3-hour ferry ride away. In Korea, summer comes in June, with a month of high temperatures and high humidity but relatively little rain, aside from the frequent but short afternoon thunderstorms. Then with July and August (give or take a few weeks) comes the rainy season, when it rains for days on end--and is so cloudy and humid the rest of the time that it might as well be raining.
Fukuoka, it turns out, is the opposite. The rains come in June and July, then the relatively drier summers season occupies August and part of September. So it's been hot as heck, but with some sun nearly every day!