Weather

The weather (Japanese: weather) is a set of mechanics in the Pokémon games.
==In the core series games==
In the core series, the weather changes the battle environment, activating , modifying certain moves, and potentially damaging the in battle or affecting their stats. They have been included in every core series game since Generation II. Only one type of weather may be present at a time; an effect that creates weather will remove the previous weather.
In Generation II, the only way to cause weather was by a Pokémon using a move in-battle. Generation III introduced weather-related Abilities as well as overworld weather; starting a battle in an overworld location with weather would cause that weather to be automatically present from the beginning of the battle. Generation IV introduced four held items (Heat, Damp, Smooth, and Icy Rocks) that increase the duration of weather caused by or Abilities. Generation V introduced s, which may affect the weather in certain locations, and Generation VI introduced a new evolution method affected by the weather. Generation VIII introduced overworld effects that resemble weather but do not directly correspond with an in-battle weather.
===Pokémon battles===
====List of weather====
The following lists all the weather conditions in s. Note that in , weather conditions do not behave the same way they do in the other games.
Weather	Image	In-game description 	Details
 	 	The harsh sunlight weather condition. It boosts the power of Fire-type moves and lowers the power of Water-type moves. 	Harsh sunlight strengthens the power of moves by 50% and weakens the power of moves by 50%. During harsh sunlight, no Pokémon can be .
In , it instead increases the Speed of Grass-type Pokémon and activates 's Sunshine Form.
 	 	
The rain weather condition. It boosts the power of Water-type moves and lowers the power of Fire-type moves. 	Rain strengthens Water-type moves by 50% while weakening Fire-type moves by 50%.
 	 	The sandstorm weather condition. At the end of each turn, it damages all Pokémon that are not Rock, Ground, or Steel types. It boosts the Sp. Def of Rock-type Pokémon.	Any Pokémon that is not -, -, or will be damaged for 1/16 of its maximum HP at the end of each turn. Certain prevent damage from weather effects, though, and a Pokémon holding Safety Goggles is also immune to damage from weather effects.
Since Generation IV, in a sandstorm, the of Pokémon is increased by 50%.
 	 	The hail weather condition. At the end of each turn, it damages all Pokémon that are not Ice types. 	Any Pokémon that is not will be damaged for 1/16 of its maximum HP at the end of each turn. Certain prevent damage from weather effects, though, and a Pokémon holding Safety Goggles is also immune to damage from weather effects. This weather was replaced by Snow in Generation IX.
 	 	
The snow weather condition. It makes Blizzard more likely to hit and boosts the Defense of Ice-type Pokémon. 	Snow increases the of Pokémon by 50%. This weather condition replaces Hail in Generation IX.
 	 	N/A 	This weather condition only exists in Sinnoh and Hisui. A thick fog clouds the overworld and battlefield, reducing the accuracy of all moves.
 	 	The extremely harsh sunlight weather condition. It boosts the power of Fire-type moves and protects Pokémon from Water-type moves. 	Sunlight shines more heavily on the battlefield. This has only occurred in the overworld in the Hoenn region, in Pokémon Omega Ruby, due to 's emergence.
 	 	The heavy rain weather condition. It boosts the power of Water-type moves and protects Pokémon from Fire-type moves. 	Rain falls more chaotically around the battlefield.
 	 	The strong winds weather condition. The power of moves that are super effective against Flying-type Pokémon is decreased. 	Strong winds causes -, -, and moves to deal neutral damage to Flying-type Pokémon.
 	 	N/A 	Any Pokémon that is not a Shadow Pokémon will be damaged for 1/16 of its maximum HP.
This weather condition is only present in Pokémon XD: Gale of Darkness and has no overworld manifestation anywhere.
=====Pokémon Legends: Arceus=====
Weather	In-game description 	Details
 	The Speed of Grass-type Pokémon is boosted. 	Increases the Speed of Grass-type Pokémon. Activates 's Sunshine Form.
 	Damage dealt by Fire-type moves is reduced. 	Damage dealt by Fire-type moves is reduced.
 	Pokémon are more likely to get frostbite, and drowsy Pokémon are more likely to fail to act. The Speed of Ice-type Pokémon is also boosted.	Pokémon are twice as likely to get frostbite, and drowsy Pokémon are twice as likely to fail to act. The Speed of Ice-type Pokémon is also boosted by 33%.
 	All moves are less accurate, apart from moves that are always sure to hit. 	A thick fog clouds the overworld and battlefield, reducing the accuracy of all moves.
====Moves affected by weather====
Certain specific moves are also affected in special ways by the weather.
*The recovery moves , , and restore more HP than usual in harsh sunlight, and less than usual in most other weather.
**In Generation II, during no weather they normally restore ¼ total HP, during harsh sunlight they normally restore ½ total HP, and during other weather they normally restore ⅛ total HP. Except in link battles, the amount of HP restored is doubled if it is the move's preferred time of day (morning for Morning Sun, day for Synthesis, night for Moonlight).
**From Generation III onward, during no weather or strong winds they restore ½ total HP, during harsh sunlight they restore ⅔ total HP, and during other weather they restore ¼ total HP.
*The move restores ⅔ of the user's total HP during a sandstorm; outside of a sandstorm, it only restores ½ total HP.
*The accuracy of , , , , , and are affected by the weather.
**From Generation IV onward, during hail Blizzard ignores accuracy and evasion checks.
**During rain, Thunder and Hurricane ignore accuracy and evasion checks; during harsh sunlight, Thunder and Hurricane only have 50% accuracy.
**In Generation IX, during rain, Bleakwind Storm, Wildbolt Storm, and Sandsear Storm ignore accuracy and evasion checks.
**In only, Blizzard and Thunder also have a 30% chance to hit through or when used in hail or rain, respectively.
* and become one-turn moves in harsh sunlight, skipping their charge turn; in rain, sandstorm, hail, and fog, the moves' powers are halved.
*From Generation V onward, during harsh sunlight increases the user's and by two stages each instead of one.
*In Generations IV and V, and , when used as a field move fails if there is a non-aesthetic weather effect in the area.
*The move can only be used successfully during hail or snow; otherwise it fails.
====Activated Abilities====
The following Abilities are activated when a type of weather comes into effect. Most of these Abilities have no effect if no weather is active.
Harsh sunlightExtremely harsh sunlight	RainHeavy rain		/Snow
 	 		
 	 		
 	 		
 	 		
 	 		
 	 		
 	 		
 	 		
In addition to the above Abilities, is guaranteed to restore a Berry whenever it triggers in harsh sunlight, and the Abilities and will prevent weather-related damage.
====Castform and Weather Ball====
 is a Pokémon uniquely designed to take advantage of the weather. Its Ability, , causes it to change form when a type of weather is present. Forecast does not cause a unique change for every possible type of weather, though.
NormalDuring clear skies, fog,, ,and strong winds	Sunny FormDuring harsh sunlightand extremely harsh sunlight	Rainy FormDuring rain and heavy rain	Snowy FormDuring
 is a move that uniquely takes advantage of the weather. In Generation III, it was introduced along with Castform and was Castform's signature move.
Whenever there is a type of weather present, Weather Ball's base power will double to 100. Weather Ball's type also changes during most types of weather.
Duringclear skies	Duringharsh sunlight/extremely harsh sunlight	Duringrain/heavy rain	During	During	During	Duringfog/strong winds
Because of its Ability, Castform has a unique synergy with Weather Ball that no other Pokémon that can learn Weather Ball has. In harsh sunlight, rain, or hail, Castform will always get STAB thanks to its Ability.
====Causing weather====
Most of the types of weather have a move or Ability that will cause that weather.
 	Clear skies	Harsh sunlight	Extremely harsh sunlight	Rain	Heavy rain				 	Fog 	Strong winds
Move 	 	 	— 	 	— 				 	—	—
Ability	— 	 	 	 	 				—	—	
 and also suspend the effects of weather while they are active.
Weather normally lasts for 5 turns when it is called by a move. Prior to Generation VI, weather created by an Ability would continue until the battle ended or another type of weather took its place; since Generation VI, weather created by Abilities also lasts for only 5 turns, with the exception of weather created by , , and . As of Generation IX, moves and Abilities that change the weather will fail if a weather condition is occurring in the overworld.
If multiple Pokémon with Abilities that change the weather are sent in simultaneously, the Abilities activate in order from fastest Pokémon to slowest Pokémon (or the reverse during ); this means that the slowest Pokémon's Ability will override the other Abilities.
If a Pokémon holding one of four held items creates weather that would otherwise last 5 turns, it instead lasts 8 turns. The rock that affects each type of weather is shown below.
Harsh sunlight	Rain		/Snow
 	 		
====Visual indicators====
=====Generation V=====
In Generation V, the weather was given an icon which appeared on the DS or 3DS's bottom screen in a battle whenever weather was occurring. Since fog and shadowy aura do not appear in-battle in Generation V, they have no icons. When there is no weather, no icon is shown.
Game	Harsh sunlight	Rain		
 	 	 		
 	 	 		
=====Generation VI=====
In Generation VI onwards, the background of the bottom screen shows an animation of the current weather.
=====Generation VII=====
In Pokémon Sun, Moon, Ultra Sun, and Ultra Moon, the 3DS's bottom screen displays an icon and background animation of the current weather.
Weather 		
Harsh sunlight 		
Extremely harsh sunlight		
Rain 		
Heavy Rain 		
 		
 		
 		
=====Generation VIII=====
======Sword and Shield======
In , weather conditions can be seen in-battle by pressing Y for Info.
The "Info" view in
======Legends: Arceus======
In , weather conditions can be seen in-battle by pressing + to open the "Status Info" view, noted at the bottom of the view. 
The "Status Info" view in
=====Generation IX=====
In , weather conditions can be seen in-battle by pressing Y for Check Status, listed under "Active Battle States and Effects". Weather conditions caused by the overworld will not display a duration, and they may appear or disappear without notice as the overworld weather changes.
The "Check Status" view in
===Overworld===
Overworld weather varies between games. There are a larger variety of overworld weather conditions compared to a battle, however some conditions do not affect battles. If a weather condition is present in a Route, sector of the Wild Area or location within Pokémon Legends: Arceus or , the weather will appear in every battle and last until it is replaced by another weather, and returns to the original weather in the overworld. In addition, Defog may clear fog from an overworld area (in Sinnoh only).
 is a special, purely aesthetic version of light snow, and replaces hail where applicable, allowing the player to battle without the effects of hail, without changing the weather manually. It first appeared as an Easter egg in , and has appeared in several core series games since.
====Weather-dependent evolution====
Starting at level 50, (as well as its Hisuian form) will evolve into if it is leveled up during rain or fog in the overworld.
First evolution	 	Second evolution
 	→while or	
 	 	
First evolution	 	Second evolution
 	→while or	
Hisuian Form 	 	Hisuian Form
====Johto====
* In , is always rainy.
** The Lake of Rage is also rainy on most days of the week, but is clear on Wednesdays.
* The snow on the summit areas of Mt. Silver Cave will activate in battles.
====Hoenn====
In Hoenn, several areas have weather conditions that occur naturally:
* Fog is present at the summit of Mt. Pyre, but it has no effect in battles.
* There is always a sandstorm on Route 111
* It frequently rains on , with clear skies only on one in four days.
* It always rains on a section of between the two log bridges corresponding roughly where the Ancient Tomb is located.
* It rains on one in four days in - at the same time, the rain on Route 119 will be thundery.
Several weather conditions are also triggered by in-game events:
* When is awakened, a rain/heavy rain is present. In contrast to natural rain, rain summoned by Kyogre includes thunderstorms as well as more rain.
* When is awakened, harsh sunlight/extremely harsh sunlight is present.
* involves both Groudon and Kyogre being awakened in that order. Groudon is awakened first but does not immediately change the weather; once Kyogre is awakened, the weather will alternate between rain and harsh sunlight.
The requisite visit to Seafloor Cavern to defeat Maxie/Archie will subsequently awaken Groudon/Kyogre and cause the respective weather condition to affect four cities: Lilycove City, Mossdeep City, Sootopolis City and Ever Grande City, as well as their connecting routes east of Lilycove. In , after reaching the Sky Pillar during the crisis, its unique weather distortion will spread to the routes east of but not including Pacifidlog Town as well. While the weather condition is present, a different background music plays, overriding the usual city and route themes as well as the surfing and cycling themes.
====Sinnoh====
* A is present on at all times.
* Fog obscures the player's overworld vision on the northern section of , the basement floor of Mount Coronet, the upper floors of the Lost Tower, the postgame section of Sinnoh's , and Turnback Cave. It can be removed using .
** In , fog activates in battles.
====Unova====
In Unova, s play a significant role in what weather conditions can form in the overworld.
In Generation V, it is possible to temporarily remove overworld weather by saving the game, setting the DS's clock to one month later (to change the season), loading the save file, and catching a Pokémon without leaving the area. This works even if the area always has the same weather regardless of the season.
====Kalos====
====Alola====
*A Sandstorm will be present in Haina Desert between 5:00 PM and 9:59 AM. Otherwise, the weather will be Harsh Sunlight.
Rain will occur in several locations, and depends on certain conditions:
* In Brooklet Hill will rain during Lana's trial, after catching or defeating the first Wishiwashi, and before completing the trial.
** In , it will instead rain between catching/defeating the second Wishiwashi and before completing the trial.
* Lush Jungle, Brooklet Hill, Malie City, Malie Garden, Routes 10, 11, 12, 13, Blush Mountain, and Secluded Shore will rain between 5:00 PM and 6:00 PM.
* Tapu Village and Route 14 will rain on some days.
* Exeggutor Island will rain at certain times with two different intensities, light rain will occur between 10 AM - 3:59 PM, and strong rain will occur between 6 PM - 11:59 PM.
* Route 17 will always rain.
====Galar====
In , overworld weather effects mostly occur in the Wild Area, Isle of Armor, and Crown Tundra, including those that do not directly correspond to the in-battle weather mechanic.
Icon	Weather 	Pokémon	Effect in battle
 	Clear (はれ) 	, , 	—
 	Cloudy (くもり) 	, , 	—
 	Rain (あめ) 	, 	Rain
 	Thunderstorm () 	, , 	Rain,
 	Snow (ゆき) 	 	
 	Blizzard () 	, 	
 	Harsh sunlight (ひでり) 	, 	Harsh sunlight
 	Sandstorm () 	, 	
 	Fog () 	, , 	
====Hisui====
In Pokémon Legends: Arceus, weather is a mechanic that is completely controlled by the environment, and it is reset each day. Weather plays a role in the spawn distributions of wild Pokémon and also has certain in-battle effects. There are no moves that can affect the weather.
Icon	Weather 	Effect in battle
 	Sunny 	The Speed of Grass-type Pokémon is boosted by 33%.'s Sunshine Form will be active.
 	Harsh sunlight	The Speed of Grass-type Pokémon is boosted by 33%.'s Sunshine Form will be active. Space-time distortions will not appear.
 	Cloudy 	
 	Rain 	Damage dealt by Fire-type moves is reduced by 25%.
 	Thunderstorm 	Damage dealt by Fire-type moves is reduced by 25%. Space-time distortions will not appear.
 	Snow 	Pokémon are twice as likely to get frostbite, and drowsy Pokémon are twice as likely to fail to act. The Speed of Ice-type Pokémon is also boosted by 33%.
 	Blizzard 	Pokémon are twice as likely to get frostbite, and drowsy Pokémon are twice as likely to fail to act. The Speed of Ice-type Pokémon is also boosted by 33%. Space-time distortions will not appear.
 	Fog 	All moves are less accurate, apart from moves that are always sure to hit.
====Paldea, Kitakami, and Blueberry Academy====
In , the player can check the current weather from their map. Overworld weather changes much more frequently in this game. 
Icon	Weather 	Effect in battle	Locations
 	Clear 	 	Everywhere
 	Cloudy 	 	Everywhere
 	Rain 	Rain 	
 	Thunderstorm 	Rain 	
 	Snow 	 	
 	Blizzard 	Snow 	
 	Diamond Dust 	 	Glaseado Mountain
 	Sandstorm 	 	Asado Desert
 	Fog 	 	Kitakami
 	Harsh sunlight	Harsh sunlight 	
==In the spin-off games==
===Pokémon Mystery Dungeon series===
Various weather effects appear in certain dungeons in the Pokémon Mystery Dungeon series. Weather effects can change from floor to floor, and can also be altered through the use of Wonder Orbs. In Gates to Infinity, Pokémon will regenerate HP only if the weather is Clear, or if it is holding a . In and Rescue Team DX, Pokémon can regenerate HP in any weather as long as they do not take damage from the weather condition, or if it is holding a .
===Pokémon GO===
Various weather effects appear in , intended to reflect the actual weather. Weather in each local area is updated every hour, on the hour, via . Each weather offers various weather boosts to Pokémon belonging to specific types.
===Pokémon Masters EX===
Weather functions similarly in Pokémon Masters EX as it does in the main series games, though some of the effects are slightly tweaked.
*Sunny: Boosts Fire-type attacks by 50%. Additionally, Pokémon cannot be frozen, and previous Pokémon that were frozen prior to the weather condition being implemented will not be frozen anymore after the weather takes effect.
*Rain: Boosts Water-type attacks by 50%.
*Hail: Damages Pokémon after every action.
*Sandstorm: Damages Pokémon after every action.
==Trivia==
* There is a glitch that occurs in , , called acid rain, that results in the simultaneous occurrence of all then-existing weather conditions at once, damaging all Pokémon on the field, unless the Pokémon is immune to both and , like , or if its Ability is .
* The Weather Institute in Hoenn is dedicated to the study of weather. It is said to have created , a Pokémon that changes with the weather.
* The Generation III core games internal data contains an unused overworld effect of four falling snowflakes.
* Defog is the only move that affects weather in the overworld.
==In other languages==
==Related articles==
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Category:Game mechanics
Category:Pokémon world
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es:Tiempo atmosférico
fr:Météo (mécanisme)
it:Condizione atmosferica
ja:てんき
zh:天气