We have not performed the necessary testing to legally acquire either a "waterproof" or "water-resistant" designation for our components. However, both our controller and blower have performed without issue when exposed to normal weather conditions.
If extreme weather conditions are expected or experienced during cooks, we have had users place a non-metallic bowl turned upside-down over our 100, 200, 300, and 500 controllers or used something as simple as a zip-lock bag to protect them from downpours. Users have also fashioned an aluminum foil "tent" over and around the blower to prevent extreme wind and rain from infiltrating the blower air intake vent.