All of my wreaths are considered suitable (durable to moderate) for outdoor exposure.
If hanging your wreath on an exterior door, I recommend hanging it on a door that has some kind of overhang so it is out of the weather. Direct sun exposure over time will fade a wreath, some flowers or mesh faster than others. But don't worry, your wreath should give you 3-4 seasons of enjoyment.
Remember to save your box so that when you change out your wreath you have a way to store it.