LocalizedWeather

Vanilla Minecraft keeps one weather state for the entire world. LocalizedWeather divides the world into a grid of 256×256 block regions, and each region runs its own weather schedule independently. Biome-aware rules shape what falls in each zone, and transitions between neighboring zones blend smoothly, so a seam between two zones never shows a hard edge. Weather in the mod follows the geography of the world rather than a single global clock.

Storms in the mod are tracked as cells. When a zone turns thundery, a storm cell spawns with a core 70–130 blocks across and travels for 4–10 minutes at roughly 3–6 blocks per second. The rain wall moves with the storm, so rain arrives when the core passes over and leaves once the core is gone. Distant storms are fogged at the horizon and culled, but their geometry is projected so a thunderstorm several zones out still shows on the skyline. Weather happens automatically, and no commands need to be learned to use it.

The mod requires Fabric API. Mod Menu is optional and shows the in-game mod information. LocalizedWeather is published for Fabric, Forge, NeoForge and Quilt across nine release versions, 1.21.1 – 26.3, and is released under the MIT License, so the code is open source. Because the environment is client and server, both the server and every player need the mod, while NeoForge installs need neither Fabric Loader nor Fabric API.