It's all documented in the robotaxi tracker:
This is also well documented across reddit.
The week that tesla launched robotaxi in florida, waymo was down almost the entire week in miami and orlando due to rain. Keep in mind there was almost no rain at the time. It was simply a weather forecast of rain that kept them down.
Even when they used to run in rain there are instances of heavy rain where they pull over to the side of the road wait for it to clear.
This, for example is pushing the limit of any rain I think waymo can even operate in without pulling over
The thing about waymo is they push "fixes" for recalls like passing school buses, driving into floodwaters, etc. but these fixes seem to not work. It's like they actually can't fix these long standing issues