Fahrenheit. Yes, it is too hot; home-brewed coffee is ~140 degrees. McDonalds was warned multiple times, at least once by a burn victims' society, that their coffee was dangerously hot prior to this case but chose to do nothing about it. I don't know the exact temperatures that McDonalds & Starbucks currently serve their coffee at, but that specific McDonalds franchise lowered the temp by ~10 degrees afterwards, and though I've never measured the temperature of my Starbucks coffee (from multiple franchises), it's never been much hotter than the drip coffee I make at home.