That's hard for humans too. I think we need to give up on the idea that fully autonomous driving will be perfect.

I'm obviously talking about matching human performance and this is the hard problem

There is also an easy solution of just staying put.

I have driven in snow a few times that I was not sure I was even on the road. Or the only way I knew I was going the right direction was because I could vaguely see the break lights of the car going 15mph in front of me through snow.

That is an easy problem to solve though because I simply should not have been driving in that.

Humans are pretty terrible at driving in rain and snow as well.