Point-to-Point APs that will survive a Canadian winter

Hey friends,

Working on a project to get camera + gate access out to a remote area of our campus. We'd like to set up a Point-to-Point wireless to expand our network out to that area. Distance is about 500m with clear line of sight.

We had been looking at the Ubiquiti NanoStation AC, but it doesn't seem all that robust... while the temperature rating fits within our environment, there are no seals around the points of entry etc. and I worry about moisture ingress effecting reliability. Has anyone been reliably using these throughout a harsh winter?

Are there any other reputable options for a simple point-to-point that is rated for outdoor use?

Thanks!