Thermia
Thermia gives Fabric players a temperature system that touches creatures, weather, held gear and most of the base game, with the mod's own name appearing early on for clarity.
What it does
Temperature becomes a core mechanic that players track and act on. Lower temperatures lead to hypothermia, which slows movement and damages over time, while higher temperatures cause hyperthermia, which deals damage and removes the ability to sprint. Sun position, surrounding blocks, biome, held items, equipment and active enchantments all push the value up or down, and certain damage types can nudge mobs closer to freezing or burning.
Players are expected to prepare for extreme climates, such as the Nether, with suitable blocks, items and equipment before fighting there. The design centers on a detailed, dynamic temperature system that ties into much of the base game, with ideas borrowed from Don't Starve Together and The Legend of Zelda: Breath of the Wild. Thermia requires Fabric API and oωo (owo-lib); Mod Menu and Serene Seasons are optional, and Tough As Nails is listed as incompatible. It runs on the client and the server, and files target 1.21.4 only, published under the Creative Commons Attribution 4.0 license, which is not open source.
Key features
Dynamic temperature
Creatures, the biome, the sun's position and nearby blocks all feed into a temperature value the player must manage.
Hypothermia and hyperthermia
Cold slows and damages over time, while heat causes damage and blocks sprinting, so both ends of the scale need attention.
Gear and enchantments
Held items, equipment and active enchantments change how the player's temperature responds to the environment.
Damage types
Certain damage types push mobs closer to freezing or burning, adding a temperature effect to combat.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Optional 2
Incompatible 1
Use cases
Who it’s for: Players who want survival challenges built on temperature, and modpack makers who want a difficulty layer that changes how the base game plays.
How it compares
Thermia is a Fabric mod for 1.21.4 that both sides must run, released under the Creative Commons Attribution 4.0 license. BITE is also Fabric and Client and server, but it is for 1.21.10 and is All rights reserved, so it is not open source. Lous temperature is Fabric, Client and server, open source under the MIT License, and covers 1.20.1 – 26.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Thermia | Fabric | 1.21.4 | Client and server | 2025-02-17 |
| BITE | Fabric | 1.21.10 | Client and server | 2025-11-02 |
| Lous temperature | Fabric | 1.20.1 – 26.2 | Client and server | 2026-09-04 |
Questions
Does Thermia need Fabric API?
Does the server need Thermia as well?
Can Thermia be used with Tough As Nails?
How is Thermia customized?
In the catalog
Thermia is one of 6,151 Food mods on ModsFinder, and one of 2,715 Food mods for Fabric. 17,979 mods support Minecraft 1.21.4.
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What the author says
Thermia is an in-depth, dynamic temperature system with heavy integrations into vanilla content and features and a big focus on being fun for the player, rather than being unnecessarily difficult. The mod was mainly created as an alternative to famous temperature systems like Tough as Nails, and takes some…
Official listing
- Modrinth page
- modrinth.com/mod/thermia
- Owner
- SylentHuntress
- Published
- 2025-02-10
- Updated on Modrinth
- 2025-02-17
- Facts verified
- 2026-10-15