Playing on a server on 1.12.2, I used the weather machine to test around a bit while in creative. I turned the machine off, broke it n everything, but now the weather is clear 24/7, and even using the /weather command doesn't work, only the weather machine can change the weather now.

This is because weather2 runs on local weather systems. Using the /weather command will not change the weather as that is disabled by default. You have to wait for other storms to appear to get different weather

Of course if you want to spawn a storm, you can do so with /weather2 storm create

Can you try wiping your config folder or weather2 or coroutil data folders?

This is because weather2 runs on local weather systems. Using the /weather command will not change the weather as that is disabled by default. You have to wait for other storms to appear to get different weather

Well that's the issue; the weather isn't changing at all anymore. Not naturally, either. Literally only w weather machine.

Can you try wiping your config folder or weather2 or coroutil data folders?