Sunny Day is a Fire-type status move with no power and infinite accuracy. When used, it changes the weather to sunny for five turns, which boosts the power of Fire-type moves by 50%, while reducing the power of Water-type moves by 50%. Additionally, certain abilities and moves are affected by the sunlight; for example, the ability Chlorophyll doubles the speed of Pokémon with this ability, and the move Solar Beam requires no charging turn. Sunny Day is commonly used to support teams that rely on Fire-type moves or Pokémon that benefit from sunny weather conditions.