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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 1.21.1Mc AddonsWorld Biomes
Latest version
NeoForge-0.9.1.2
Loaders
NeoForge, Forge
Licence
not stated
Downloads
111.3k
Updated
4 d ago
Available on
CurseForge
Space NodePartner

Host Project Atmosphere: Realistic Climate & Weather servers

One click and Project Atmosphere: Realistic Climate & Weather is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

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
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023

Download

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

All 40 releases
NeoForge-0.9.1.2release30 Jul 2026

NeoForge-projectatmosphere-0.9.1.2.jar · 13.6 MB · for 1.21.1

Download latest
a8e2c9b38062
Older versions24
  • Forge-0.9.116 Jun 20261.20.114.3 MB5.9k downloads3ea7753790d5Get
  • Forge-projectatmosphere-0.9.0.1-alpha.jar13 Jun 20261.20.114.1 MB7b7f64085a6eGet
  • Forge-0.9.0.0-alpha13 Jun 20261.20.114.1 MB6e0f010db888Get
  • NeoForge-0.8.1.018 Mar 20261.21.112.4 MB9.1k downloadse33c2ec52f31Get
  • NeoForge-pre-0.8.1.017 Mar 20261.21.112.4 MBd47a9ea1a20eGet
  • Forge-0.8.1.017 Mar 20261.20.112.6 MB181 downloads6441b6a0c228Get
  • Forge-0.8.0.017 Mar 20261.20.112.6 MB184 downloads5ebb3d8da266Get
  • Forge-0.7.1.022 Jan 20261.20.112.5 MB2.2k downloads60d9d02ba1f9Get
  • Forge-0.6.0.0-preBeta-2.16 Dec 20251.20.112.4 MB8.6k downloads543a53a24898Get
  • Forge-0.6.0.0-preBeta-26 Dec 20251.20.112.4 MBb319625a36a0Get
  • Forge-0.6.0.0-preBeta-13 Dec 20251.20.112.4 MB176 downloads8cf9e22d0b84Get
  • Forge-0.6.0.0-preBeta2 Dec 20251.20.112.4 MB181 downloadsd0a8d039cc86Get
  • Forge-0.6.0.0-pre3.225 Nov 20251.20.112.3 MBeda20f723975Get
  • Forge-0.6.0.0-pre3.125 Nov 20251.20.112.3 MB6957f61ad1fbGet
  • NeoForge-0.5.5.9.325 Nov 20251.21.112.2 MB493 downloads1f3b8a77d3e6Get
  • Forge-0.6.0.0-pre325 Nov 20251.20.112.3 MBc6390c339630Get
  • NeoForge-0.5.5.9.225 Nov 20251.21.112.2 MBf4b20ee391dfGet
  • NeoForge-0.5.5.9.124 Nov 20251.21.112.2 MB1 downloadsca4f6ca4786bGet
  • NeoForge-0.5.5.924 Nov 20251.21.112.2 MB9151b1542d66Get
  • Forge-0.6.0.0-pre213 Nov 20251.20.112.3 MB89f9bae1e7a1Get
  • Forge-0.6.0.0-pre112 Nov 20251.20.112.3 MB139 downloads06f48feebf2eGet
  • NeoForge-0.5.5.88 Nov 20251.21.112.2 MB1.1k downloads59ce8ad762bdGet
  • Forge-0.5.5.77 Nov 20251.20.112.2 MB233 downloads3a3cf564785cGet
  • NeoForge-0.5.5.77 Nov 20251.21.112.2 MB0b6626538ca7Get

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 loader does Project Atmosphere: Realistic Climate & Weather need?

NeoForge, Forge. A build for one loader will not 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?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

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?

From the author's own page on CurseForge, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

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

Last checked 8 h ago against CurseForge. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .