I’m very sorry to inform you that at those temperatures you’d be frozen to death. But even once you came out with some cool (hot?) solution for this nicety, you still couldn’t ski/snowboard. That’s because the snow on earth is relatively close to 0°C, and therefore in that particular stage where ice is lighter (it has more volume) than liquid water. If you apply pressure to it it’s easier for the ice to go back to the liquid state and therefore giving you the ability to ski.
At those temperatures it would be as snowboarding on sand. Which is a very loved sport, but not that easy.