The IBiome interface allows you to retrieve information on a registered Biome.

Importing the package

Link to importing-the-package

It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import.
import crafttweaker.world.IBiome;

Calling an IBiome

Link to calling-an-ibiome

You can get a list of all registered Biomes using game.biomes from IGame

Atm, all you can do with an IBiome object is retrieving some information out of it:

ZenGetterReturn Type
ZenGetter
name
Return Type
string
ZenGetter
canRain
Return Type
boolean
ZenGetter
isSnowyBiome
Return Type
boolean
ZenGetter
highHumidity
Return Type
boolean
ZenGetter
spawningChance
Return Type
float
ZenGetter
baseHeight
Return Type
float
ZenGetter
heightVariation
Return Type
float
ZenGetter
rainfall
Return Type
float
ZenGetter
waterColorMultiplier
Return Type
int
ZenGetter
ignorePlayerSpawnSuitability
Return Type
boolean
ZenGetter
temperature
Return Type
float
ZenGetter
types
Return Type
List<IBiomeType