Weather is a game mechanic which provides an extra level of immersion for players of Minecraft, as the effects are intended to somewhat mirror real-world phenomenon. There are a few different types of weather effects, which only occur in the Overworld. Weather may have positive or negative effects on the environment, Mobs or Players.
Rain is a semi-common weather occurrence and is one of the two possible forms of precipitation. When it is raining, blue Particles streak directly down from the sky until they come into contact with a surface. Small blue particles are left for a few seconds when individual droplets hit the ground (similar to how drops can seep through blocks when seen from below).
- Monsters cannot spawn in the rain during daylight (light level 12).
- Rain will extinguish Fire upon the surface of the overworld, and even mobs that may happen to be on fire.
- Rain cannot be heard near the Bedrock layer of a world.
- Passive mobs will jump up and down, trying to keep dry.
- On multiplayer servers, players can toggle between rain and clear skies using the "toggle downfall" command.
Thunderstorms (sometimes called Thunder or Lightning) are a special type of weather that can occur anywhere (except for Desert Biomes). They are considered dangerous because they not only make the environment dark enough for hostile mobs to spawn, but have various effects on certain mobs, nearly all of which are bad for the player. Pigs, if hit by lightning become Zombie Pigmen, Villagers become Witches, and Creepers become a variant known as "Charged Creepers". Lightning can also set blocks on Fire. If lightning strikes within a few blocks/meters of any mob, they lose health.
As of The Combat Update, if a Horse is hit by lightning, it will become a skeleton trap horse. These are much more powerful than the original. To make things worse, additional skeletal horses and riders may appear near the horse that was originally struck.
Snow falls occasionally in cold Biomes, such as the Ice Plains Biome, Ice Plains Spikes Biome, and Cold Taiga Biomes. Snow can also occur in the Extreme Hills Biome, at high altitudes. Snow can cover the land with a layer, creating "ice caps" on the mountains of an Extreme Hills biome.
Overcast occurs in dry biomes, such as Deserts, Savannas, and Mesa Biomes. While it does not rain in those biomes, the light level will still drop and the Sun and Moon become shrouded, so the player can only tell their position with a clock. Overcast can be a useful sign that weather is occurring elsewhere while the player is in a Desert, Savanna or Mesa.
- Since thunderstorms are darker than rain, it is possible for mobs to spawn at any time of Daytime or Night.
- Players can still sleep as usual during a thunderstorm.
- It is very rare, but possible for a lightning bolt to activate a Nether Portal.
- If a "Charged Creeper" is struck by lightning again, it dies. This is because lightning deals damage.
- Rain can deal damage to Endermen, Blazes and Snow Golems.
- If Endermen are out in the Overworld during a rain storm, they will rapidly teleport around randomly as they attempt to find a spot where they won't get wet.
- Weather was introduced to Minecraft in update 1.5.
- Weather can be changed using "weather" Commands. To use the weather command the player must type:
/weather <clear/rainy/stormy>. The console will then announce: "Turning to (rainy/stormy/clear)".
- When the Sun is visible, it can be considered "clear weather".
- Leaving a Cauldron in the rain, may cause it to fill up with water, if a block tick hits the cauldron. This onlyhas a small chance of occurring.
- A block of Farmland may become hydrated during a rainfall.