Hi! I just saw this mod moments ago and I already love it. Here are a couple of suggestions i have just off the top of my head.

1. Wind occurring more frequently in Windswept biomes, Windstorm variant that has more and faster wind that can only occur in those biomes.
2. Heavy Rain weather variant that can happen in Jungles.
3. Blizzard variant of snow that can happen in Ice Spikes and Snowy Taigas.

i actually had the idea of heavy rain in the jungle and its planned but im currently trying to figure out how to do it without having to increase the particles needed by much (if at all) as for the other ideas i REALLY like the windswept one but for now the wind only occurs in savanna biomes and the blizzard im definetly going to do for all snow biomes when its thundering