48! That's just a little warm. And -17 for your niece is just a bit chilly! It never gets too cold in this part of Japan. It's around 5 right now. The past few summers we have been getting to 40 and a few degrees beyond, which is just brutal when combined with the high humidity of this country. Most summer school sports have moved indoors or been cancelled because the heat stroke death rate has skyrocketed for the under 18 age group. I can't imagine how much worse it'd be if we got up to 48!