What is the officially recognized coldest temperature measured by a ground-based thermometer on Earth?

Answer

-89.2 degrees Celsius

The world’s officially recognized coldest temperature, certified by the WMO and recorded by a ground-based thermometer at Vostok Station on July 21, 1983, was -89.2 degrees Celsius.

What is the officially recognized coldest temperature measured by a ground-based thermometer on Earth?
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