I just read a post from a flat earther on a flat earth page asking why people can stand outside in the sunshine with just a tee shirt or hoodie on? I tried to answer.     

   Arctic and Antarctic summers happen at opposite ends of the year. In the North it’s around June/July and in the South it’s December /January. In the summers the temperature can rise well above zero, because in the summer months the sun doesn’t set (in the winter months it stays dark for several weeks), hence, yes people can wear hoodies and tee shirts. It’s getting warmer because of global warming and it means sea ice takes longer to form. In addition the temperature rises at the poles are happening more strongly than at other parts of the globe.    

I hope this makes sense.