- Loaders
- NeoForge
- Downloads on Modrinth
- 1.7K
- Followers on Modrinth
- 24
- versions
- 4
- Updated
- October 10, 2026Oct 10
- Published
- in 2026
At a glance
Install in the game only; not needed on the server
Rainfall is a dynamic weather simulation mod that transforms Minecraft’s rain into a fully interactive water system.
Help me improve this mod!
Instead of simple visual rain, precipitation accumulates on surfaces, forming realistic puddles that grow over time. Water spreads based on terrain shape, collects in low areas, and gradually develops into flowing streams that follow natural slopes. These streams can merge, create small runoff paths, and visually connect different water bodies, all without altering or destroying blocks.
The system is designed to be performant while still delivering detailed and immersive behavior. It simulates water flow, surface spread, evaporation, and drainage in a way that feels natural and responsive to the environment.
For debugging and visualization, a built-in debug renderer is available. Press P to toggle the debug view, which displays internal simulation data such as flow directions, basins, and water distribution.
Open config menu with "k"
FAQ
How to install Rainfall?
Install NeoForge for your Minecraft version, download Rainfall for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does Rainfall support?
Rainfall has builds for Minecraft 1.21.1.
Is Rainfall needed on the server?
Client only — no need to install it on the server
