Discovering Cold and Snowy Overworld Biomes
Biomes O' Plenty adds various cold, snowy, and wintry biomes to the Overworld. These biomes feature distinct temperatures and different sets of creatures and monsters that can appear.
Snowy Biomes
Several biomes are categorized as snowy, typically having a temperature of -0.25.
The Snowy Fir Clearing is a snowy biome with a temperature of -0.25. In this biome, you may encounter monsters such as spider, zombie, zombie villager, skeleton, creeper, and slime. Common creatures include sheep, pig, chicken, cow, wolf, and rabbit.
The Auroral Garden is another snowy biome, also with a temperature of -0.25. This biome is home to sheep and fox.
The Muskeg is a snowy biome with a slightly warmer temperature of 0.0. Monsters that can appear here include spider, zombie, zombie villager, skeleton, creeper, and slime. The main creature found in this biome is the frog.
The Snowy Coniferous Forest is a snowy biome with a temperature of -0.25. This biome features common monsters like spider, zombie, zombie villager, skeleton, creeper, and slime. You can also find creatures such as wolf, rabbit, and fox here.
Cold Biomes
Other biomes are simply classified as cold, with varying temperatures.
The Cold Desert is a cold biome with a temperature of 0.25. It is notable for having no rain. Monsters that can spawn here include spider, zombie, zombie villager, skeleton, creeper, and slime. Creatures found in this biome are polar bear and wolf.
The Bog is a cold biome with a temperature of 0.2. In this biome, you can find monsters such as spider, zombie, zombie villager, skeleton, creeper, and slime. The pig is a common creature in the Bog.
The wood you can only get up here
Cold and snowy biomes are where several of the mod's twelve wood types grow. 
Fir Planks and 
Pine Planks are the characteristic northern woods, and each behaves as a complete vanilla-style wood set — planks, stairs, slabs, fences, doors and the rest — so a single trip north gives you an entire building palette that nobody else on a server will have.
Because the mod adds no structures, the trees are the reason to make the trip. There is no cabin to loot; there is a forest to harvest.
Packing for a cold survey
The practical difficulty in the snowy biomes is not danger, it is distance. Bring more food than the trip looks like it needs and mark the coordinates of each wood type as you find it, because the biomes generate in large contiguous stretches and a species you skip may be thousands of blocks behind you by the time you want it.
Bringing it back
Saplings are worth more than logs. A stack of logs builds one room; six saplings replanted at home turn a one-off expedition into a permanent supply, and every one of these woods grows in ordinary conditions once planted.
Covers the mod’s in-game guide topics: Snowy Fir Clearing Auroral Garden Muskeg Cold Desert Snowy Coniferous Forest Bog