Several years back, I managed a 3rd degree burn on my leg with a big surrounding 2nd degree area when I was in the process of making tea. I poured water out of the kettle into pitcher, and the pitcher cracked when it was nearly full. I didn't spend a lot of time analyzing the temperature(I was in too much pain...) but the water most certainly was not boiling and had been off heat long enough that I'd guess it in the ballpark of 190-200º. I was wearing a pair of cotton pajama pants, which stuck to my leg when I spilled the water. The burn covered most of my inner right thigh, although I'd guess the 3rd degree area was right where it had initially hit.
I'd believe 3rd degree from coffee at that temperature-again from first hand experience.