Homeostatic Seasons adds the four traditional seasons to Minecraft, each comprised of three distinct sub-seasons, for a total of twelve sub-seasons. Each sub-season has its own visual, weather and temperature changes.
The duration of each sub-season is three in-game days (configurable), resulting in 9-day seasons. The current season is defined by the Daytime; using /season set EARLY_SPRING will reset to day 1 of early spring, effectively setting the Daytime to 0. You can also use /time set 0 to reset to day 1 of early spring. The /season command can be used to check the current sub-season, skip to a specific sub-season or set a specific sub-season.
There is a robust configuration to customize the mod to your liking.
Homeostatic is not a required dependency unless players want to experience temperature and thirst in-game. But it is highly recommended to use Homeostatic alongside Homeostatic Seasons for the full experience.

What is different about this mod?
Homeostatic Seasons is focused on performance and compatibility from the start. The design should allow for easy compatibility with other mods and should not cause significant performance issues. Homeostatic Seasons does not add any new blocks or items, and only modifies existing game mechanics.
Additionally, the mod is highly configurable, allowing players to tailor the experience to their preferences. Players can adjust the length of seasons, the intensity of weather effects, and other aspects of the mod.
Snow and ice accumulation are handled so as not to cause significant performance issues, even in large worlds. The mod uses a chunk-based system to track snow accumulation, updating only loaded, visible chunks to the player. Plants and other blocks that are affected by snow accumulation are replaced with snow, then will revert to their original state when the snow melts.
Temperature is calculated on a per-block basis, accounting for surrounding biomes, altitude, and the current season. This allows for a more realistic temperature system that is affected by the environment. Biomes can experience a mixture of snow and rain simultaneously, depending on the temperature of the blocks in the area.
Seasonal Biomes
Biomes will have different colors and other visual features according to the current season. This is a purely visual change and will not affect your game performance. Additionally, shaders are fully supported.
Non-vanilla biomes from the major biome mods are fully supported. If the custom biome cannot be determined, it will behave as a neutral biome, with seasonal changes. If any biome is missing, please create an issue on GitHub so the biome can be fully supported.
Seasonal Weather
The weather will change according to the current season. In spring, rain is more frequent, while in summer, thunderstorms are more common. In autumn, rain becomes more frequent again, while in winter, snow is the predominant form of precipitation in cold areas. The intensity and duration of weather events can be configured to suit player preferences. Temperate biomes, such as rainforests, deserts and swamps, will experience a rainy season from mid-autumn to late winter. So, yes, you could experience snow and rain in a desert biome during winter!
All Versions
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Version 26.3-1.2.1.0
- Release 26.3-1.2.1.0
- Update dependencies.
- Update translations.
- Add ability to enable/disable water freeze/ice melt feature.
- Update gradle and dependencies.
Version 26.3-1.2.1.0
- Release 26.3-1.2.1.0
- Update dependencies.
- Update translations.
- Add ability to enable/disable water freeze/ice melt feature.
- Update gradle and dependencies.
Version 1.21.1-1.2.1.0
- Release 1.21.1-1.2.1.0
- Update dependencies.
- Update translations.
- Add ability to enable/disable water freeze/ice melt feature.
Version 1.21.1-1.2.1.0
- Release 1.21.1-1.2.1.0
- Update dependencies.
- Update translations.
- Add ability to enable/disable water freeze/ice melt feature.
Version 26.3-1.2.0.4
- Release 26.3-1.2.0.4
- Update testing mods.
- Fix dimension whitelist logic for water freezing.
Version 26.3-1.2.0.4
- Release 26.3-1.2.0.4
- Update testing mods.
- Fix dimension whitelist logic for water freezing.
Version 26.3-1.2.0.3
- Release 26.3-1.2.0.3
- Port to 26.3
Version 26.3-1.2.0.3
- Release 26.3-1.2.0.3
- Port to 26.3
Version 26.2-1.2.0.3
- Release 26.2-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 26.2-1.2.0.3
- Release 26.2-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 26.1.2-1.2.0.3
- Release 26.1.2-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 26.1.2-1.2.0.3
- Release 26.1.2-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 1.21.1-1.2.0.3
- Release 1.21.1-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 1.21.1-1.2.0.3
- Release 1.21.1-1.2.0.3
- Don't freeze waterlogged blocks in cold seasons. Thanks Stick Boy for reporting!
Version 26.2-1.2.0.2
- Release 26.2-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update datagen files.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Temporary disable testing deps.
- Port to 26.2
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 26.2-1.2.0.2
- Release 26.2-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update datagen files.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Temporary disable testing deps.
- Port to 26.2
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 1.21.1-1.2.0.2
- Release 1.21.1-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update Homeostatic version for testing.
- Release 1.21.1-1.2.0.1
- Update translations.
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 1.21.1-1.2.0.2
- Release 1.21.1-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update Homeostatic version for testing.
- Release 1.21.1-1.2.0.1
- Update translations.
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 26.1.2-1.2.0.2
- Release 26.1.2-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update Homeostatic version for testing.
- Release 26.1.2-1.2.0.1
- Update translations.
- Update BlockTags provider.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 26.1.2-1.2.0.2
- Release 26.1.2-1.2.0.2
- Only check canFreeze/canMelt in valid dimensions. Fixes #6
- Update Homeostatic version for testing.
- Release 26.1.2-1.2.0.1
- Update translations.
- Update BlockTags provider.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 26.1.2-1.2.0.1
- Release 26.1.2-1.2.0.1
- Update translations.
- Update BlockTags provider.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 26.1.2-1.2.0.1
- Release 26.1.2-1.2.0.1
- Update translations.
- Update BlockTags provider.
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update ignored build files.
- Update documentation ... again.
- Update documentation
- Add project context documentation
- Update shared agent rules
Version 1.21.1-1.2.0.1
- Release 1.21.1-1.2.0.1
- Update translations.
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 1.21.1-1.2.0.1
- Release 1.21.1-1.2.0.1
- Update translations.
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 1.21.1-1.2.0.0
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 1.21.1-1.2.0.0
- Release 1.21.1-1.2.0.0
- Reduce radiation seasonally.
- Change melting mechanics of snow and ice to account for ground temperature in different seasons.
- Update ignored files.
- Update coloration blacklist settings to be per biome for Foliage, Grass and Birch.
- Update documentation ... again.
- Update documentation
- Add project context documentation
Version 26.1.2-1.1.0.13
- Release 26.1.2-1.1.0.13
- Update API so season is annotated as @NonNull, and declare some values as Nullable. Ensure we don't get inadvertent crashes on tinting for leaf litter or birch foliage tinters in non-seasons dimensions.
Version 26.1.2-1.1.0.13
- Release 26.1.2-1.1.0.13
- Update API so season is annotated as @NonNull, and declare some values as Nullable. Ensure we don't get inadvertent crashes on tinting for leaf litter or birch foliage tinters in non-seasons dimensions.
Version 1.21.1-1.1.0.13
- Release 1.21.1-1.1.0.13
- Update Birch foliage mixin to not cause crash when displaying birch leaves in dimensions that don't support seasons.
- Update build for Java 25
Version 1.21.1-1.1.0.13
- Release 1.21.1-1.1.0.13
- Update Birch foliage mixin to not cause crash when displaying birch leaves in dimensions that don't support seasons.
- Update build for Java 25