Weather Rocks

Weather Rocks are held items that extend the duration of the corresponding weather, introduced in Pokémon Diamond and Pearl.

Damp Rock
The Damp Rock extends the duration of Rain Dance for eight turns.

Heat Rock
The Heat Rock extends the duration of Sunny Day for eight turns.

Icy Rock
The Icy Rock extends the duration of Hail for eight turns.

Smooth Rock
The Smooth Rock extends the duration of Sandstorm for eight turns.