Coldest natural air temperature measured on Earth (Antarctic)-89.2 °C
Mercury Freezes-38,8 °C
Water freezes ¹0 °C
Earth surface, average over year, land and ocean 1978 ²14,1 °C
Earth surface, average over year, land and ocean 2017 ²14,9 °C
Hottest natural air temperature measured on Earth, Furnace Creek, USA56,7 °C
Water boils ¹100 °C (actually 99.974 °C)
Molten SteelAbout 1 600 °C
Surface of the SunAbout 5 500 °C
Centre of the Earth (estimate)About 7 000 °C
Centre of the Sun (estimate)About 15 million °C

1 changes with altitude, this value at sea level.
2 This year’s value.

Most people use the degree Celsius (°C) where °C = K – 273.15.