
WeatherCore
Library mod for registering custom weather conditions
About this Mod
WeatherCore
WeatherCore is an intrusive core library mod that overhauls Minecraft's hardcoded weather system, replacing it with a flexible weather system with the possibility of registering new weather types.
For users
Installed alone, this mod doesn't alter vanilla weather, but might alter the way Minecraft choose its next weather due to replacing the hardcoded weather timers with a complex weather management system.
Only install WeatherCore if a dependency requires it.
Key Features
- Custom weather registry: Register custom weather conditions.
- Weather management: Replaces vanilla's basic timers with a management system.
- Scoping: A scope defines the zones a weather condition affects inside a level. Weather themselves are not "aware" of what scopes they own so any custom weather conditions can be summoned globally or centered.
- Replaces
/weathercommand and adds a/toggledownfallcommand.
Weather scopes
Any custom weather condition created with this library will own a scope when summoned. It can either be:
- Global Scope (dimension wide)
- Perfect for vanilla style weathers
- Affects the entire dimension
- Centered
- Ideal for events, like a fallout after a nuclear explosion or a cursed fog after activating a mysterious monolith.
- Good for letting players decorate their builds
- Maybe good for tornadoes? Why not use entities instead?
Development
WeatherCore is currently under active development and is mostly bespoke to my own projects. I am looking for feedback from other developers to make the mod more universally useful and ensure it integrates smoothly with other mods.
If you want to use WeatherCore, use the artifact from Modrinth's maven:
repositories {
maven {
name = "Modrinth"
url = "https://api.modrinth.com/maven"
}
}
dependencies {
modImplementation "maven.modrinth:weathercore:mc1.21.1-0.1.0"
}
Credits
The icon of WeatherCore and Weather Extended is made by anyputer
Available Versions
How to Install WeatherCore on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set neoforge Loader
In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "WeatherCore". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
WeatherCore server crashes on startup – what to do?
Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is WeatherCore compatible with neoforge?
WeatherCore officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with WeatherCore – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if WeatherCore consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install WeatherCore with just one click on your server.