projectatmosphere-0.5.4.4 is a beta file of the Minecraft mod Project Atmosphere: Realistic Climate & Weather for NeoForge, made for Minecraft 1.21.1. It was published on October 7, 2025 and is 12.2 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Project Atmosphere: Realistic Climate & Weather mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
