I have had this mail box hanging outside for a year now. It has been fully exposed to the rain in Vancouver, Canada and did not fair well. The top discoloured drastically and took on a chalky grey finish. Rain water collected in the bottom and make the mail wet. There are two small holes to let the water drain but the coastal rain was too much for it. It would work best for a covered area where it would be protected from the sun and rain. 
The price was not worth the performance.