tried this, didnt work
var biome = level.getBiomeManager().getBiome(position).get()
var climate = biome.getModifiedClimateSettings()
error:
02:27:34] [ERROR] ! example.js#11: Error in 'ServerEvents.tick': TypeError: Cannot find function getModifiedClimateSettings in object Reference{ResourceKey[minecraft:worldgen/biome / terralith:highlands]=net.minecraft.class_1959@815ed22}.