This mod adds a singular block: The Weather Anchor.
Disclaimer: This mod is very experimental and probably won't be updated frequently.
Recipe

Function
Add Amethyst Blocks into the Weather Anchor's GUI, then click the weather you want. It consumes an Amethyst Block every time you change the weather. The weather should change, even if you don't have commands enabled. Currently, the Clear weather option executes the /weather clear 0 command, because /weather clear starts a thunderstorm about 5 minutes later.
Future Stuff (Maybe)
- Support for modded weather
- Better GUI
- Blockstate to change texture depending on if the block holds Amethyst Blocks
- Functionality to explode in weather-less dimensions like a Respawn Anchor
Feel free to use this mod in your pack.
Made with MCreator :)

