I mean you can connect the computer to sprinklers that activate when the system detects rain in the simulation if that's what you're after (that was just an aside to note that of course you don't get wet from a simulation disconnected from the real world).

But I guess that was a distraction from the main point: If consciousness emerges from biological processes in the brain connected to the world with a body, why would it not emerge from a simulation of these processes connected to the real world with sensors and actuators?

It seems like circular reasoning to me: The simulation is not like the real thing because it lacks the special thing that enables consciousness (that's Searle's biological naturalism). And it lacks what enables consciousness because it's not the real thing (that's the weather analogy).