While we've heard from some customers who have used the Hub outdoors, it was designed for indoor use.
If you'd like to keep the Hub outside, ensure that it's in a relatively dry and shaded area. The Hub can withstand normal moisture from a typical dog's tongue or nose, but shouldn't be exposed to excess moisture, such as from rain or snow. The lit touchpads may also be difficult to your dog to see if it's exposed to direct sunlight.
Also keep in mind that the Hub must be plugged in and connected to WiFi.