This depends on how powerful your antenna are, $200 wigig transmitters will struggle with much range over those distances.

And how directional and narrow the gain pattern is.

Summers in South Florida will put that to the challenge.

People can't see in that weather either

This has been my argument all along. People are driving in unsafe conditions when they should be stopped.

In florida, I will say when it truly pours like that people do tend to drive extremely slowly and turn on their hazards. Also, sometimes these storms just appear out of nowhere. Over the summer I was driving from the Vero beach area to fort lauderdale and on the way to Vero beach, clear skies and on the way back there was an ENORMOUS storm that flooded streets and you couldn't see crap. It just happens

Moreover, contrary to some other commenters:

Unless it truly is "once-in-a-lifetime", or very brief, you cannot just stop and give up. To be a viable replacement, a vehicle must (as a human driver would) continue to make progress even in extremely adverse conditions. The progress might be much slower than usual, might be a re-routing (back up away from floodwater and go elsewhere), etc.

just because you can't write code to handle it doesn't mean a human can't. thousands and thousands of people drive in rain, sleet, snow and hail daily and do it just fine.

Humans do not do just fine - look at the statistics of car accidents. Humans refuse to admit how bad they really are at driving.