Sol's RNG Biomes and Weather Explained
Biomes and weather in Sol's RNG are timed map events that boost your Breakthrough multiplier and unlock auras you cannot roll under normal conditions, like Wind and Stormal during the Windy weather or Monarch during Corruption. The system rolls a chance every second, so most biomes are rare and only last a few minutes, which is why many players carry a Biome Randomizer or Strange Controller item to force one instead of waiting.
Updated Sep 9, 2026. Source.
How the system works
The biome and weather system runs on its own roll, checked every second, separate from your aura rolls. When one triggers, it changes how the map looks, raises your Breakthrough multiplier while it is active, and unlocks a small set of auras that can only drop during that specific biome or weather.
The more common biomes
Windy, Rainy and Sandstorm are on the more frequent end, each lasting around 2 to 11 minutes and carrying a Breakthrough multiplier between 3x and 4x. Windy unlocks Wind, Flow and Stormal, Rainy unlocks Poseidon, Sharkyn and Leviathan, and Sandstorm unlocks Gilded, Jackpot and Anubis. Hell and Heaven sit in a similar range, Hell leaning into Undead and Hades style auras, Heaven pushing a 5x multiplier and Divinus and Archangel style auras.
The rarest biomes
Corruption, Null, Dreamspace and Glitched are the ones worth planning around. Corruption is one of only two conditions that can drop Monarch, the game's highest rolled aura. Dreamspace and Glitched are reported as the rarest of all, with spawn odds down around 1 in 30,000 or worse per second and short windows once they do appear. Exact odds and even which biomes are currently in the game move with each content update, so if two guides disagree on a number, trust whichever one is dated closer to today.
FAQ
Which biome can drop the Monarch aura in Sol's RNG?
Monarch only drops during the Corruption biome or the Glitched biome, and even then its own odds are extremely low on top of the biome being rare to begin with.
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