英语中问天气的几种说法?

what's the weather like tody?how is the weather today?
还有老外平时见面打招呼时问候说的 it's a good\bad\rainy\cold\……day,isn't it?
it's going to rain\wind\……,isn't it?
特别是英国人,见面就用问天气打招呼,就像中国人见面问“吃了没”一样.