Rain

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BiomeBannerRain.png

I hope it doesn't rain again until this paint dries. That would be a disaster!

The Painter

Rain is an event that affects all surface biomes for its duration. Each Rain event occurs randomly[1] and always lasts for 24 in-game hours (24 real-world minutes), spanning both day and night portions. When a player is in a Snow biome during Rain, it appears as a Blizzard, causing snowfall volume to increase.

Rain is primarily an aesthetic effect, only visible on the surface: It displays Rain/Blizzard graphics, darkened ambient sun/moon light, increased cloud cover, and altered music. There are, however, some functional effects.

The event spawns variants of some regular enemies, but also a few unique enemies, and certain critters behave differently. Some comical effects include Zombies wearing raincoats, slimes carrying umbrellas, and Goldfish walking upright on land, using their tail fins to casually shuffle about (swimming Goldfish will exit water and walk, and walking Goldfish will also spawn on land).

On the Desktop version Desktop version, Console version Console version, Mobile version Mobile version, and Legacy tModLoader version Legacy tModLoader version, Rain has three different variations; Light Rain, regular Rain, and Heavy Rain. The heavier the rainfall, the dimmer the sunlight will be, with Heavy Rain causing noticeable darkness. These variations are only graphical, can be detected with a Weather Radio, and can change multiple times throughout a single downpour. If a Windy Day occurs at the same time as regular or Heavy Rain, it will result in a Thunderstorm.

On the Desktop version Desktop version, Console version Console version, and Mobile version Mobile version, the chance for Rain to occur can be boosted by killing regular Ladybugs[2].

Rain does not produce new water tiles, nor does it cause existing water levels to rise, and it has no effect on lava or honey tiles.

Other effects include the following:

Occurrence

Rain cannot be initiated manually, it always occurs randomly. In Journey Mode, however, Rain can be controlled freely via the Power Menu.

The chances fluctuate irregularly between 1 in 475,200 and roughly 1 in 345,600 per tick[3]. Throughout a full in-game day, the chance of Rain can be anywhere between 18.2% and 25%. This is equivalent to Rain occurring every 4 to 5.5 in-game days, or every hour and 36 minutes to 2 hours and 12 minutes in real-world time.

Immediately after world generation, the chance of Rain occurring is permanently 18.2% and does not fluctuate for between 2 minutes and 24 seconds and 24 minutes.[4]

Killing regular Ladybugs or using them in fishing will increase the chance of Rain to occur per tick by 1 in 86400. The chance boost lasts for 30 seconds, and multiple Ladybugs will stack the duration up to 300 seconds[5].

Contents

Notes

The visual effects of a Blizzard.
  • Normal Snow biome enemies will continue to spawn during a Blizzard.
  • Rain can interfere with a Blood Moon or Solar Eclipse because of the additional enemies that spawn, making certain enemies from those events rarer.
  • If Rain coincides with a Blood Moon, walking Goldfish will still turn into Corrupt Goldfish, which do not walk upright in Rain like normal Goldfish do.
  • The Weather Radio will detect if it is raining on surface (regardless of the player's position).
  • The rainfall animation is blocked by blocks. This makes no difference to the blooming of Waterleaf, but does prevent the spawning of Worms.

Trivia

  • There was once going to be a "rain accumulation" mechanic, which would make the rain flood holes, bunkers, and similar structures. The player would then have to build systems to get rid of the water.[6] This mechanic was later scrapped.
  • Desktop version Rain's animation stops when the screen is exited in windowed mode (unlike other animations).
  • When it is raining and snowing at the same time, the snow animation stops, but not the rain animation.
  • The rain effect caused by Rain Cloud is unrelated to the Rain event and is purely aesthetic.
  • If Rain coincides with a Blood Moon, Rain will appear to be red-colored.
  • Old-gen console version If the game is exited to the title screen during Rain, the background will show fog. This happens even when going into a new world and exiting again. To remove the effects, the game needs to be closed.
  • In the old Mobile version Mobile version, Console version Console version, and Old-gen console version Old-gen console version, the Morning Rain music used to be exclusive through the Tutorial. It has since been implemented into the Desktop version Desktop version as the Morning Rain theme.

See also

References

  1. see below for details
  2. Information taken from the Desktop version Desktop 1.4.3.6 source code, method LadyBugKilled() in Terraria.NPC.cs.
  3. A tick is a time unit countable by the software. Most of Terraria's updating logic happens every tick. A tick has the length of 1/60th of a second, hence there are 60 ticks in a second and 3600 ticks in a minute.
  4. Information taken from the Desktop version Desktop 1.4.3.6 source code, method UpdateTime() in Terraria.Main.cs. There are three conditions in this method where StartRain() is called. The second condition, which causes the chance to fluctuate, requires the variable cloudBGactive to be positive. That variable is set to a random negative value upon world generation and gets increased every tick.
  5. Information taken from the Desktop version Desktop 1.4.3.6 source code, method UpdateTime() in Terraria.Main.cs.
  6. Terraria's 8th Anniversary - Ask Redigit and Cenx! May 20, 2019

History

  • Desktop 1.4.0.1:
    • Added the Morning Rain soundtrack, which plays when it's raining between 4:30 AM and 7:30 AM.
    • Added Thunderstorms with exclusive music which occur when Rain and a Windy Day occur together.
    • Rain is slightly less common.
    • Rain now takes on the water color of the biome it is falling in.
  • Desktop 1.3.4:
    • Fixed edges of screen getting inverted colors during a Blizzard.
    • It no longer rains in the Space biome.
    • The Blizzard weather event now has a new, unique ambient sound when active.
  • Desktop 1.3.3.3:
    • Fixed Snow sometimes not appearing during Blizzards.
    • Improved performance during Blizzards on some machines.
  • Desktop 1.3.3:
    • Blizzards now have a new visual effect.
    • Fixed liquid and rain sounds persisting while the game window is inactive.
  • Desktop 1.2.3:
    • Fixed minor bug with rain sounds.
    • Optimized rain performance.
    • Slightly reduced chance of rain.