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The 96-day dynamic climate & weather wave system

The regular 4-day rainfall cycle: In almost all biomes – except for hot biomes, tundra, ice peaks, jungle – it rains consistently once every 4 days year-round.

Regardless of its form, rain or snow always lasts for exactly 10 minutes and cannot be skipped by sleeping in a bed. During a 10-minute snowstorm, snow always accumulates by 0.1 layer, even on top of ice during a snowstorm.

Once spring begins in a specific biome, snow melts at a rate of 0.2 layers during the day but does not melt at all during the night. Snow melts just as quickly during a spring rainstorm as it does on a clear spring day.

When the snow has completely melted in the spring, there is a 1-day transition period during which any remaining ice melts from the water sources. On the following day, the greening process begins, lasting for four days before peak summer lushness is reached.

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    Autumn colors transition over four days – from pale brown to deep orange and finally to leafless branches. After this fourth autumn day, the biome’s freezing period begins, causing water sources to freeze over, and the snow from the very next snowfall will stay on the ground.

    Jungle: Immune to seasons. Always lush. Rain begins exactly at midday (when the sun reaches its highest peak) and ends precisely at sunset (when the bottom edge of the sun touches the horizon line at sea level) every single day.

    The hot biomes rainy season: The rainy season lasts 4 days in the desert, 8 days in the badlands and 12 days in the savanna. The rainy season begins on the same day in the desert, the savanna, and the badlands, and the rain itself starts at the same time of the in-game day as in the jungle. Once the rainy season ends, the rapid 4-day growth phase and subsequent 4-day drying phase occur.

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    Tundra: 60 days of winter and 24 days of full summer. It rains once every 12 days.

    The biomes listed below follow a regular 4-day rainfall cycle:

    Mangrove swamp: 12 days of winter (sleet that falls but never accumulates). 76 days of full summer.

    Plains: 16 days of winter (snow accumulates 0.1 layers per storm, melts on the next clear day). 72 days of full summer.

    Swamp: 20 days of winter. Snow depth increases by 0.1 layers per storm and stays until spring. 64 days of full summer.

    Forest: 24 days of winter (snow stays until spring). 60 days of full summer.

    Cherry Grove: 28 days of winter (snow stays until spring). 55 days of full summer. 

    Dark forest: 32 days of winter. 51 days of full summer.

    Birch forest: 36 days of winter. 46 days of full summer.

    Meadow: 40 days of winter. 42 days of full summer.  

    Old growth taiga: 44 days of winter. 37 days of full summer.

    Taiga 48 days of winter. Max snow height 1.2 blocks (12 snowstorms total). 33 days of full summer. 

    Permanent snow/ice biomes: Snows once every 12 days. New snow never accumulates and old snow never melts unless manually dug.

    World Gen: When a new world is created, there are 12 days of full summer left in the tundra, and 30 days left in the forest. The game starts at the peak of summer.