That seems counter-intuitive, but it's true. The South Pole’s average January temperatures are about -15 degrees Fahrenheit, and it dips down to about -49 degrees Fahrenheit by March.
There are no camels wandering around, instead there are 4 species of penguins. How then, can the South Pole be considered a desert? Well, for one thing, the desert classification has nothing to do with temperature or sand or camels; it has to do with precipitation, namely, the lack of it.
The South Pole has a desert climate because it almost never receives precipitation. The air humidity is near 0. When it does snow however, the low temperatures are able to sustain it and the high winds cause it to blow around, thus resulting in a total snow accumulation of 7.9 inches per year. This also renders the South Pole as inhabitable as any other desert.