Menu

mod

Project Atmosphere: Realistic Climate & WeatherMinecraft mod for 1.21.1

Project Atmosphere is a Forge mod that adds dynamic weather, realistic temperature, seasonal effects, and cloud simulation with full Serene Seasons support.

newest supported release 1.21.1Mc AddonsWorld Biomes
Latest version
Forge-0.9.4
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Forge, NeoForge
Licence
not stated
Downloads
126.7k
Updated
2 mo ago
Available on
CurseForge

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Project Atmosphere: Realistic Climate & Weather declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From Project Atmosphere: Realistic Climate & Weather’s own host. Nothing is re-hosted here.

Browse 44 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    NeoForge-0.9.1.2 · 30 Jul 2026 · NeoForge-projectatmosphere-0.9.1.2.jar

    Get NeoForge

Most recently published release

Forge-0.9.4release15 Sept 2026

Forge-projectatmosphere-0.9.4.jar · 38.0 MB · for 1.20.1 · Forge

Download this release
403e0ca28919…
Older versions24
  • Forge-0.9.3.110 Sept 20261.20.129.1 MBc4d27aa63db6…Get
  • Forge-0.9.310 Sept 20261.20.129.1 MB8d06e1d5a34b…Get
  • Project Atmosphere 0.9.23 Sept 20261.20.113.9 MBfdb35526575e…Get
  • NeoForge-0.9.1.230 Jul 20261.21.113.6 MB110 downloadsa8e2c9b38062…Get
  • Forge-0.9.116 Jun 20261.20.114.3 MB5.9k downloads3ea7753790d5…Get
  • Forge-projectatmosphere-0.9.0.1-alpha.jar13 Jun 20261.20.114.1 MB7b7f64085a6e…Get
  • Forge-0.9.0.0-alpha13 Jun 20261.20.114.1 MB6e0f010db888…Get
  • NeoForge-0.8.1.018 Mar 20261.21.112.4 MB9.1k downloadse33c2ec52f31…Get
  • NeoForge-pre-0.8.1.017 Mar 20261.21.112.4 MBd47a9ea1a20e…Get
  • Forge-0.8.1.017 Mar 20261.20.112.6 MB181 downloads6441b6a0c228…Get
  • Forge-0.8.0.017 Mar 20261.20.112.6 MB184 downloads5ebb3d8da266…Get
  • Forge-0.7.1.022 Jan 20261.20.112.5 MB2.2k downloads60d9d02ba1f9…Get
  • Forge-0.6.0.0-preBeta-2.16 Dec 20251.20.112.4 MB8.6k downloads543a53a24898…Get
  • Forge-0.6.0.0-preBeta-26 Dec 20251.20.112.4 MBb319625a36a0…Get
  • Forge-0.6.0.0-preBeta-13 Dec 20251.20.112.4 MB176 downloads8cf9e22d0b84…Get
  • Forge-0.6.0.0-preBeta2 Dec 20251.20.112.4 MB181 downloadsd0a8d039cc86…Get
  • Forge-0.6.0.0-pre3.225 Nov 20251.20.112.3 MBeda20f723975…Get
  • Forge-0.6.0.0-pre3.125 Nov 20251.20.112.3 MB6957f61ad1fb…Get
  • NeoForge-0.5.5.9.325 Nov 20251.21.112.2 MB493 downloads1f3b8a77d3e6…Get
  • Forge-0.6.0.0-pre325 Nov 20251.20.112.3 MBc6390c339630…Get
  • NeoForge-0.5.5.9.225 Nov 20251.21.112.2 MBf4b20ee391df…Get
  • NeoForge-0.5.5.9.124 Nov 20251.21.112.2 MB1 downloadca4f6ca4786b…Get
  • NeoForge-0.5.5.924 Nov 20251.21.112.2 MB9151b1542d66…Get
  • Forge-0.6.0.0-pre213 Nov 20251.20.112.3 MB89f9bae1e7a1…Get

Frequently asked

Does Project Atmosphere: Realistic Climate & Weather work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Project Atmosphere: Realistic Climate & Weather declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Project Atmosphere: Realistic Climate & Weather support?

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does Project Atmosphere: Realistic Climate & Weather support?

Forge, NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Project Atmosphere: Realistic Climate & Weather?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

How do I install Project Atmosphere: Realistic Climate & Weather?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Project Atmosphere: Realistic Climate & Weather safely?

Start with the author's page on CurseForge, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Details from CurseForge, where the author last updated it on 15 Sept 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .