The weather is a Battle mechanic that change the battle environment, activating abilities, modifying the effect of certain moves, and affecting certain Pokémon stats, form and types. Specific weather conditions can cause some Pokémon species to take damage at the end of each turn.
Only one type of weather may be present at a time; an effect that creates weather will remove the previous weather.
|The absence of weather. This is the weather found at the start of each battle.|
|Also known as Sunny, it boosts some effects concerning Grass- and Fire-type Pokémon and moves.|
|A rarer variant of Harsh Sunlight, only occurs when Primal Groudon is on the field.|
|Also known as Rainy, it boosts some effects concerning Water- and Electric-type Pokémon and moves.|
|A rarer variant of Rain, only occurs when Primal Kyogre is on the field.|
|It boosts some effects concerning Rock-, Steel- and Ground-type Pokémon and moves; Pokémon of any other type are damaged by 1⁄16 of their maximum HP.|
|It boosts some effects concerning Ice-type Pokémon and moves; Pokémon of any other type are damaged by 1⁄16 of their maximum HP.|
|A strong air current blows across the battlefield, only occurs when Mega Rayquaza is on the field.|
|Harsh sunlight||Extremely harsh sunlight||Rain||Heavy rain||Sandstorm||Hail||Strong winds|
|—||Sunny Day||—||Rain Dance||—||Sandstorm||Hail||—|
|Air Lock, Cloud Nine||Drought||Desolate Land||Drizzle||Primordial Sea||Sand Stream, Sand Spit||Snow Warning||Delta Stream|
Weather normally lasts for 5 turns when it is called by a move or ability, with the exception of weather created by Desolate Land, Primordial Sea, and Delta Stream.
If multiple weather-changing moves/abilities are used in the same turn, the weathers will activate in order from fastest Pokémon to slowest Pokémon, meaning the last weather used will override the others.
It is possible to extend the duration of weather conditions from 5 to 8 turns by giving one of four held items to the Pokémon responsible of summoning it.
|Heat Rock||Damp Rock||Smooth Rock||Icy Rock|