Weather effects???

Question

I've heard in black and white the weather effects are different apparently hail boosts special defense for ice types is this true and what are the other weather effects???

Answer 1

Ice types are immune to damage from Hail persistent effect.

Ground types are immune to damage from Sandstorm persistent effect.

Rock types are immune to damage from Sandstorm persistent effect. Their Special Defense also increases.

Steel types are immune to damage from Sandstorm persistent effect.

Some pokemon have abilities that increase their stats depending on the whether. Examples would be Swift Swim in Rain, or Sand Veil in a Sandstorm.

Answer 2

Http://bulbapedia.bulbagarden.net/wiki/Hail

no,it does not boost ice type sp.def