I live in Québec city whe we have a lot of snow and snow storm. So, with open bottom like that, with snow and wind, is not an option, the middle space will be full of snow very rapidly. So, in my case, this would not work. To make sure, sun will not heat the sensors, paint the inside black, to cut as much uv rays as possible. Keep the outside white to reflect as much sun as possible.
J Guy