Read this blog ! Practice your English! Come on ( venga ya)!. No deadlines (fechas tope). No exams. It's just a fun way to learn the language.
Talking about the weather in English and in Spanish should be easy. We learn the basic vocabulary as children: sun=sol, clouds=nubes, rain=lluvia, hot=calor, cold=frío. So what happens when you try to start up a conversation with someone. The weather should be a nice warm-up, a bit of small talk before any real communication takes place.