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Weather conditions

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Reason: Generation VI details; Gates to Infinity descriptions.

The weather (Japanese: 天気 weather) is a set of mechanics in the Pokémon games that change the battle environment, activating Abilities, modifying certain moves, and potentially damaging the Pokémon in battle or affecting their stats. They have been included in every main series game since Generation II. In battle, weather is either determined by the location of a battle, due to overworld weather, or by a Pokémon creating a new weather condition with a move or Ability. Only one weather condition may be present at a time, and only the most recent weather condition will take effect.

In Generation II, only moves that cause weather were introduced and weather was only present in battles, not in the overworld. Generation III introduced overworld weather and weather-related Abilities, as well as a new weather-causing move. The biggest modification to weather in Generation IV was the introduction of four rocks that, when held, would increase the duration of weather caused by a weather move. Generation V mostly introduced greater overworld weather variability, especially in seasons affecting the weather in certain locations.

Types of weather and effects

  • Clear skies: Actually the absence of weather. This is the condition found in most locations.
  • Intense sunlight: Strong sunlight shines on the battlefield. This condition has only occurred in the overworld in Generation III, due to Groudon's presence in an area.
  • Rain: Heavy rain slants across the battlefield. Different variations of this weather may appear on the overworld. This is the most common weather pattern that may be found on routes and occasionally in cities.
  • Sandstorm: Stinging sand whips across the battlefield. In Generations III through V, every new region had a specific area where a sandstorm was always occurring.
  • Hail: Pelting hail falls on the battlefield. Different variations of this weather may appear on the overworld, and there may even be benign falling snow that does not cause hail in a battle.
  • Shadowy aura: Bursts of light rain down from a shadowy aura in the sky. This weather condition is only present in Pokémon XD: Gale of Darkness and has no overworld manifestation anywhere.
  • Fog: A thick fog clouds the battlefield. This condition only had an in-battle effect during Generation IV, but it has been present in the overworld in other Generations in a purely aesthetic form.

There is also a glitch that occurs in Pokémon Platinum, HeartGold and SoulSilver, called acid rain, that results in the simultaneous occurrence of all weather conditions at once, damaging all Pokémon on the field.

In Generation V, the weather conditions were given icons which appeared on the DS or 3DS's bottom screen in a battle whenever that weather was occurring. Since fog and shadowy auras were only present in-battle before Generation V, they have no icons. When there is no weather, no icon is shown.

Game Intense sunlight Rain Sandstorm Hail
BW Sunlight icon BW.png Rain icon BW.png Sandstorm icon BW.png Hail icon BW.png
B2W2 Sunlight icon B2W2.png Rain icon B2W2.png Sandstorm icon B2W2.png Hail icon B2W2.png

In Generation VI the background of the bottom screen shows an animation of the active weather condition.

Most of the weather conditions have a move or Ability that will cause that weather.

Clear skies Intense sunlight Rain Sandstorm Hail Shadowy aura Fog
Move Defog* Sunny Day Rain Dance Sandstorm Hail Shadow Sky
Ability Air Lock,
Cloud Nine
Drought Drizzle Sand Stream Snow Warning

In addition, Defog may clear fog from an overworld area (in Generation IV only). It is the only move that has any effect on weather conditions in the overworld.

Weather normally lasts for 5 turns when it is called by a move. Prior to Generation VI, weather conditions created by an Ability would continue until the battle ended or another weather condition took its place; since Generation VI, though, weather conditions created by Abilities also last for only 5 turns. However, there are four held items that can increase the duration of summoned weather effects, so that they last 8 turns. The rock that affects each type of weather is shown below.

Intense sunlight Rain Sandstorm Hail
Dream Heat Rock Sprite.png
Heat Rock
Dream Damp Rock Sprite.png
Damp Rock
Dream Smooth Rock Sprite.png
Smooth Rock
Dream Icy Rock Sprite.png
Icy Rock

Three of the weather conditions can do damage to Pokémon in battle at the end of a turn. In a sandstorm, hail, or shadowy aura, any Pokémon that is not Rock-, Ground-, or Steel-type; Ice-type; or a Shadow Pokémon (respectively) will be damaged for 1/16 of its maximum HP. Certain Abilities prevent damage from weather effects, though, and a Pokémon holding Safety Goggles is also immune to damage from weather effects.

Sandstorm and fog both affect the stats of Pokémon on the battlefield. Since Generation IV, in a sandstorm, the Special Defense of Rock-type Pokémon is increased by 50%. In fog, the accuracy of all Pokémon in battle is decreased.

During intense sunlight, all Pokémon are immune to freezing.

Intense sunlight and rain both affect the power of certain types of moves. Intense sunlight strengthens the power of Fire-type moves by 50% and weakens the power of Water-type moves by 50%, while rain does the opposite, strengthening Water-type moves while weakening Fire-type moves.

Certain specific moves are also affected in special ways by the presence of a specific weather condition.

  • The recovery moves Synthesis, Morning Sun, and Moonlight will recover different amounts* of HP depending on the weather: in clear skies, they recover 1/2 of the user's maximum HP; in intense sunlight, they recover 2/3 HP; and in other weather conditions, they recover 1/4 HP.
  • The accuracy of Thunder, Hurricane, and Blizzard is affected by different weather conditions. In hail, Blizzard ignores accuracy and evasion checks*, while Thunder* and Hurricane do the same in rain. During intense sunlight, however, Thunder and Hurricane only have 50% accuracy. In Pokémon Diamond and Pearl, Blizzard and Thunder also had a 30% chance to hit through Protect or Detect when used in their favored weather conditions.
  • Solar Beam becomes a 1-turn move in intense sunlight, skipping its charge turn, but in rain, sandstorm, or hail, Solar Beam's power is halved.
  • Growth's stat increases double in intense sunlight (since Generation V).
  • When used as a field move in Generation IV or later, Sweet Scent will fail to work if there is a weather condition in effect in the area.

Activated Abilities

The following Abilities are activated when a weather condition comes into effect. Unless a weather condition is in effect, none of these Abilities has any effect.

Intense sunlight Rain Sandstorm Hail
Forecast Forecast Sand Veil Forecast
Dry Skin Dry Skin Sand Rush Ice Body
Chlorophyll Hydration Sand Force Snow Cloak
Flower Gift Rain Dish
Leaf Guard Swift Swim
Solar Power

In addition to the above Abilities, Harvest is guaranteed to restore a Berry whenever it triggers in intense sunlight, and the Abilities Overcoat and Magic Guard will prevent weather-related damage.

Castform and Weather Ball

Main article: Castform (Pokémon)
Main article: Weather Ball (move)

Castform is a Pokémon uniquely designed to take advantage of weather conditions. Its Ability, Forecast, causes it to change form when a weather condition is present. Forecast does not cause a unique change for every possible weather condition, though.

351Castform Normal Dream.png
During clear skies, fog,
sandstorm, or shadowy aura
Sunny Form
351Castform Sunny Form Dream.png
During intense sunlight
Rainy Form
351Castform Rainy Form Dream.png
During rain
Snowy Form
351Castform Snowy Form Dream.png
During hail

Weather Ball is a move that uniquely takes advantage of weather conditions. In Generation III, it was introduced along with Castform and was Castform's signature move. Since then, a number of other Pokémon have become able to learn Weather Ball, but Castform remains the only Pokémon able to learn it by leveling up, without needing the services of a move relearner.

Whenever there is a weather condition present, Weather Ball's base power will double to 100. Weather Ball's type also changes during most weather conditions.

clear skies*
intense sunlight
shadowy aura

Because of its Ability, Castform has a unique synergy with Weather Ball that no other Pokémon that can learn Weather Ball has. In intense sunlight, rain, or hail, Castform will always get STAB thanks to its Ability.

Weather-dependent evolution

Starting at level 50, Sliggoo will evolve into Goodra if it is leveled up while it is raining in the overworld.

Middle Trigger

Level 50
while raining

Weather in Pokémon Mystery Dungeon

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 not restore health via walking unless the weather is Clear.

  • Clear: Allows Pokémon to restore HP by walking or holding the A and B buttons.
  • Sunny: Fire-type moves increase power by 50%, while the power of Water-type moves is cut in half.
  • Fog: The power of Electric-type moves is cut in half.
  • Snow: Ice-type Pokémon have an increased movement speed.
  • Rain: Water-type moves increase power by 50%, while the power of Fire-type moves is cut in half. Also prevents explosions from traps and moves like Selfdestruct.
  • Hail: Deals 5 points of damage to non-Ice types every 10 turns.
  • Sandstorm: Deals 5 points of damage to non-Rock, Ground, and Steel types every 10 turns.
  • Cloudy: Reduces the damage of all non-Normal-type moves by 25%.

Gates to Infinity descriptions

Clear Sunny Fog Snow Rain Hail Sandstorm Cloudy

The weather is clear and pleasant. In this weather, you can restore your HP naturally just by walking.

The sun blazes. In this weather, you can't restore your HP naturally. It boosts the power of Fire-type moves and weakens Water-type moves.

It's rainy and humid. In this weather, you can't restore your HP naturally. It boosts the power of Water-type moves and weakens the power of Fire-type moves.

A sandstorm rages. In this weather, you can't restore your HP naturally. Also, all Pokémon, except Ground, Rock, and Steel types, keep taking damage. Sp. Def of Rock types goes up.


Weather conditions
Intense sunlightRainSandstormHailShadowy auraFog
Extremely harsh sunlightHeavy rainStrong winds

Project Games logo.png This game mechanic article is part of Project Games, a Bulbapedia project that aims to write comprehensive articles on the Pokémon games.