The Wilsonart laminate site says:
"Sunlight - Prolonged exposure to the direct rays of the sun may cause your Wilsonart® surface to fade or yellow. For this reason, Wilsonart® decorative laminates and metals are not recommended for use out of doors or in direct sunlight. Direct sunlight can also open laminate joins. Always ensure joins are not placed in direct sunlight or exposed to heat producing appliances such as kettles or frypans"
I few years ago I built a small utility trailer for hauling my tools... basic plywood box with a slightly curved top. I had some plastic laminate left over from restaurant jobs, so it was free. I glued it to the sides with some Henry's vinyl baseboard glue I also had left over. I covered the edges with aluminum counter top edging bedded in butyl rubber caulk. It held up very well for about 5 years and never leaked. the color faded a little bit over time, but not all that much. It was a golden oak colored Wilsonart and white on top. All I ever did was wax it like I did my truck. I sold it to another guy that does trim work on new houses... far as I know he still has it.
Today I would use PL Urethane caulk, but back then butyl rubber was what they used for van conversion windows and skylights... so I used it. I think as long as the edges are sealed well it will hold up well outdoors. They even make some cool metalic colors now that look like metal. I haven't tried them yet outdoors... but I've been thinking about it.
The three brands I use are Pionite, Wilsonart and Formica
(listed 123 in price I have found)