Does low temperature effect bonding?

[Anjaba]

Are elements able to form a wider variety of molecules at lower temperatures vs say 20^oC?

 

[MagnetDave]

It's hard to characterize the variety as "wider." There are certain compounds only stable at cryogenic temperature (and things like Bose-Einstein condensates) but there are also compounds only stable at higher temperatures.

What is generally more significant is that the kinetics of the reactions are slowed down, so everything tends to take place on a much longer time scale.