I've had my hub since December, and I've not noticed any weather related issues with it so far. There hasn't been much in the way of heavy rain, but the little that we have had hasn't affected it.
I'm still waiting to see what effect the budding of the trees will have on the unit. Being in the middle of a forest, this will possibly be an issue. It doesn't affect our cell phone access (although my cell phone is with Bell rather than Rogers).