This has been the most pleasant July weather-wise in recent memory. Part of it is that the tsuyuake (end of rainy season) is running late this year, and it usually gets super hot and muggy after tsuyuake. But even accounting for that, it has been quite mild thus far.

I'd imagine that early Sept will be a different story, though. Hokkaido will certainly be much more likely to be less hot, although it can also get quite hot up here also.