Анна, права

Thank you Anna and Daniil. =)

It was cloudly a hour ago it's raining now ( "теперь идёт дождь")

Both ways are right but there is a difference: Сейчас идёт дождь is just a statement, you are telling a fact. Usually we use the word теперь when we compare past and present. Было солнечно, а теперь идёт дождь. So "теперь идёт дождь" sounds natural when you add something before that :)