Rain appearing in biomes/dimension despite the fact that it shouldn't

Hello, after looking through as many posts on here I could find, I was wondering if there was a way to prevent rain from appearing in a certain dimension, or biome

I have done things such as
trying to make a script to toggle the downfall in that dimension
setting the biomes in that dimension's temperature to max and slightly lower than max

I was wondering if there was a workaround or bit of code that I can put in the biomes/dimension to prevent this from happening, as my mod has races, and the race from this dimension literally dies in the rain.