Coolest or coldest?? The coldest region is definitely the Antarctic. Antarctica to be exact.
Greenland
Africa
mesosphere.
monutins
arctic coastal plain
Mesosphere
Tundra - Canada's most northerly vegetation region.
taiga
I think that the Yakutsk region is the coldest region, even colder than Siberia.
In the Yukon village Snag
The coldest region in the Earth's atmosphere is found in the mesosphere, which is the third layer from the Earth's surface. Temperatures in the mesosphere can drop as low as -90 degrees Celsius (-130 degrees Fahrenheit).