When you open your world's that had clear weather on them when you last left, sometimes the world will open with a fake rain weather.

The fake rain weather has visuals of the rain, from raindrops to the fog and the changed colour of the sky. But you can also notice in this fake rain that Fire doesn't get doused and basically, fire still works and buggy sometimes.

Here's a video showing how I used commands to /weather clear the fake rain.