How to check if it is raining or not.

[the_BigGinge_nafe_innit12]

I am creating a mod on forge 1.20.1 that makes Minecraft more wintery. I want to make it so that it always snows but I can't find how weather works in Minecraft. My plan was to check if it is raining, and if it is not in a biome that doesn't rain anyway, it instead snows. The fake code below is the logic I was thinking of.

public class Weather {
    static void ontheground() {
        // look at the block, starting from the build limit going down untill the block is not air
    }

    if(raining == true) {
        if(biome != biometype.savana | biometype.desert) {
            particle.render(snow)
                    place(Blocks.SNOW, ontheground, (x, y+1))
        }
    }
}

Edited November 2 by the_BigGinge_nafe_innit12