Waymo does work in rain and fog. They are permitted to operate in both of those conditions in San Francisco. They also do extensive weather testing, including a

Waymo does work in rain and fog. They are permitted to operate in both of those conditions in San Francisco. They also do extensive weather testing, including areas with snow, so presumably they are close to cracking that as well. https://blog.waymo.com/2021/11/a-fog-blog.html https://blog.waymo.com/2021/11/a-fog-blog.html