How cold can California deserts get vs a Antarctica desert?

California deserts, such as the Mojave and Sonoran, can experience temperatures that drop to around 20°F (-6°C) at night during winter, while daytime temperatures can be much warmer. In contrast, Antarctica, classified as a cold desert, can see winter temperatures plummet to -40°F (-40°C) or lower, with record lows reaching nearly -128°F (-89°C). The extreme cold in Antarctica is due to its high elevation and location at the poles, making it significantly colder than California's deserts.