Frozify

Frozify is a mod that will add temperature mechanics to Minecraft. Now the player will have a body temperature.
If the player is in a cold biome, his temperature will rise and steam will come out of his mouth.
Hypothermia can lead to death. In the desert, the player will be hot, but not so hot that he will die.
Blocks such as bonfire, torch, lava and others will keep the player warm. The complexity of the surrounding world will affect the player's freezing rate.
In the water, during rain, or near cold blocks, the player will feel very cold.

Armor

To travel through the cold biomes, you need to create winter clothes, which are created from leather armor, wool and thread.
Leather armor also protects against the cold, but less effectively.

The mod works with Optifine, but in version 1.20.1 simplified armor models will be used with Optifine.

Thermometer

The mod adds a new item - a Thermometer. To find out your temperature, hover over the thermometer in the inventory and press Shift.

Wall thermometer

A Wall Thermometer is a block that shows the ambient temperature.
Hovering over it, you will see the temperature value.
Depending on the ambient temperature, the unit changes and produces a different redstone signal.

The temperature system works only in the upper world, in hell and the end it is disabled. 
Versions below 1.19.2 are stripped down and do not contain the full functionality of the mod (thermometer block).