Why does my world thunder and rain?

It's normal to have thunderstorms in my world, but the probability is very small, there is nothing wrong with it. Just be careful there are lightning coolies around. It's a little long If it is noisy, you can turn off the weather effect in the settings. If it gets stuck, you can enter instructions.

My world weather description is as follows:

1. If it rains, just enter /weather rain and it will turn into rain.

2. If it doesn't rain and it's sunny, it will become no weather.

3, thunderstorm, need to enter/the weather thunders.

After switching to thunderstorm weather, it will become very dark, zombies will be born, and there will be lightning every 30 seconds. )