Rain

Rain occurs randomly and affects all surface biomes for its duration. Each Rain event begins at a random time and 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 Surface effect: It displays Rain/Blizzard graphics, darkened ambient sun/moon light, and altered music. There are however some functional effects.

Rain does not actually produce new Water tiles, doesn't cause existing Water levels to rise, and has no effect on Lava or Honey tiles, but it does spawn some unique enemies or enemy variants, and certain Critters behave differently. Some comical effects include Zombies wearing rain coats; 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 anew on land).

On the, 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 storm.

Other effects include:
 * There is a +20% Fishing Power bonus in all liquid bodies during Rain.
 * Waterleaf blooms.
 * Worms spawn frequently in Forest biomes.
 * NPCs remain in their Houses, as if it were night.

Trivia

 * Rain's animation stops when you exit the screen 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.
 * You can create 'rain' using Rain Cloud, though this has nothing to do with the Rain event and is purely aesthetic.
 * Occasionally, on the, lightning and subsequent thunder will occur during rain. This causes nothing but an aesthetic flash of light and sound.
 * If Rain coincides with a Blood Moon, Rain will appear to be red-colored.
 * If you exit 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 close the game.

History
Regen Pluie 장마 Deszcz Дождь 雨