What is the coldest temperature ever recorded on Earth?

Officially, the lowest natural air temperature ever recorded on Earth was -89.2 °C (-128.6 °F) on July 21, 1983 at the Russian Vostok Station in Antarctica.

Related Information:

An unofficial surface temperature of -89.6 °C (-129.3 °F) was recorded at Vostok Station, Australian Antarctic Territory, Antarctica on 21 July 1983.

Another unofficial low was reported at Vostok in 1997: -91°C (-131.8 °F).

At altitudes greater than that of Vostok, on the Antarctic ice sheet, temperatures would be correspondingly lower.

Absolute zero, the low temperature limit, is -273.15 °C (-459.67 °F or 0 °Rankine)

Other reported earthly lows:

MIT reported a Bose - Einstein Condensate was at 450 pK ( 4.5x10-10 °K).

Helsinki University of Technology, Finland reported a low temperature of 100 pK ( 1.0x10-10 °K

K). This was for a particular degree of freedom.

Additionally, a NASA satellite recorded in August of 2010 in eastern Antarctica, a temperature of -94.7 C ( -135.8 F )