A Demi-God descended from the heavens to lord over the mortals of Illyria,

Beloved by all and with boundless power they benevolently reigned,

Boundless power... for a mortal,

That was not enough, that was not what they sought,

But that power was not meant for them,

And now Illyria is no more.

92 Quests to guide you through the world, story, and mods.
The entire world is turned into ice biomes with constant snow accumulation via Primal Winter
Manage your body temperature and heat your home via Cold Sweat
Build and manage your own lively colony full of NPCs with plenty of styles to choose from via MineColonies
Destroyed cities spawn throughout the world full of loot and dangers via Lost Cities
Dress and fight in style via CosmeticArmours, CosmeticWeapons & Transmog
Become a musher and have man's best friend pull your sled around via Snowy Spirit
Celebrate Christmas in September! via Mama's Merrymaking & Winterly
Take your builds to the next level via Stoneworks, Supplementaries, Domum Onamentum & More!

Don't worry it's not that hard I promise!
Cold Sweat has in-game difficultly options that you can freely change at any time to make it easier, or harder (How to get to them is explained in the Difficulty Settings quest chapter in-game, along with other optional help for the early game).
You have a 12 minute grace period when your spawn into the world (and everytime you die), use that to your advantage (and maybe turn on KeepInventory to abuse it 🤷‍♀️).
Underground caves are typically around room temperature, so head down there right away! (or even live down there if you want, there are underground colony options!)
Craft a thermometer ASAP! ( Temps below 50 = Cold | Temps above 100 = Hot )
Always carry a flint and steel with you for emergency warmth.
Two campfires are generally needed to offset the cold, so I recommend setting up multiple campfire sites around your base to provide "get warm" spots while outside.
Fully insulated armor (or a goat fur armor set) will keep you warm for about an entire Minecraft day.
Waterskins last for about 2 mins while passive heating you.
Holding a torch or lantern in your hand (or off-hand) will warm you up a little bit.
Villages are warmer than their surroundings.
The Nether is still hot, so be prepared!

Snow layers accumulate on already existing snow constantly (i.e. during clear weather), but new snow layers are only created while actively snowing / thunderstorming.
Snow accumulation stops when it reaches 1 block high.
Weather is also not skipped / cleared after sleeping.
Torches melt snow in a 2 block raidus, while lanterns and campfires melt snow in a 3 block radius (melt and prevent snow accumulation).
Husks spawn during the day in cities.
The Solas shaders are about twice as demanding as the Complementary shaders