The Ideal conditions for temperature inversion are:
Long hours, so that it is greater than the incoming radiation than the outgoing radiation.
Clear skies that allow radiation to escape unhindered.
Calm and stable air, such that, at lower speeds, there is no vertical mixing.
A temperature inversion is the reversal of the natural temperature activity in the troposphere, where a layer of cool air on the surface is replaced by a layer of warmer air. (The temperature normally decreases with height under normal conditions).