[MC]: 1.20.1
[NeoForge]: 47.1.100
[Cold Sweat]: 2.3-b02a
[Serene Seasons]: 9.0.0.46

While standing outside in a biome that doesn't normally have snowy weather in base MC, but does during the winter using Serene Seasons (for example the Taiga biome), water droplet particles fall from the character while it's snowing, as though it were raining instead. This behavior meanwhile doesn't happen during snowy weather in biomes that do have snowy weather in the base game (Snowy Taiga, etc).

I'm not sure if the reverse is true (no droplets when raining in warm months) or not, but I can check that too if needed!

Weird, they must use their own weather system. I wasn't aware of this. I'll look into it

Found a way to fix this. I'll be closing this issue and adding the fix in the next update.