Strange Planet by Nathan W. Pyle

It absolutely doesn't make any sense! 38°C is a heat wave where I live and it's a hot place, and - 10 is never reached in most places in my country. Besides, you can get a thermometer between - 30 and +50 and you'll have all temperatures you need. 0 is freezing cold, 21 is comfort room, and 25 is when the chocolate starts to melt in your fingers.