The Antarctic Desert, as the coldest and driest desert on Earth, doesn't experience a "highest climate" in the traditional sense.

Here's why:

* Extreme Cold: The average temperature in Antarctica is about -57 degrees Celsius (-70.6 degrees Fahrenheit). The lowest recorded temperature on Earth, -89.2 degrees Celsius (-128.6 degrees Fahrenheit), was measured at Vostok Station in Antarctica.

* Seasonal Variation: While there are slight seasonal variations in temperature, with slightly warmer periods during the summer months (December-February), these are still well below freezing.

* High Altitude: The Antarctic Plateau, where the coldest temperatures are recorded, is a high-altitude region.

Therefore, it's not appropriate to talk about a "highest climate" in the Antarctic Desert as it primarily experiences extreme cold.