Moldings

Molding is a strip of material with various cross sections used to cover transitions between surfaces or for decoration.

Is molding stuccoes or painted?

Your choice, It can be painted or stuccoes but paint is preferred since it is easier to apply on the edges and corner of moldings because of the detail. A darker or lighter tone then that used for the stucco is usually applied to give a nicer look

Not from temperature changes.

Are molding’s resistant to extreme temperatures and weather elements?

Yes, they are quite durable but quality depends on the manufacturer.