Argon does not melt in the typical sense. It is a noble gas, meaning it exists as a gas at room temperature and standard pressure. To transition from a gas to a liquid, argon needs to be cooled to an extremely low temperature.

Here are the relevant temperatures for argon:

* Boiling point: -185.84 °C (-302.11 °F)

* Melting point: -189.34 °C (-308.81 °F)

This means that argon solidifies directly from a gas (sublimation) at a temperature below -189.34 °C and melts directly into a gas (deposition) at a temperature above -189.34 °C.