China's weather in June?

I want to visit Beijing and xian and Guilin and Maybe shanghai , Please tell me if those cities are sunny or not during june and I heard Beijing and xian has no hard rain but Guilin has , if so , Will The Li river cruise be spoilt by rain? and does the Rain last too much or just for minutes then the sun rises again? , Thank you very much , and I want to ask about the Kind of Clothes to bring in june (short sleeves , long , etc.)

Thanks Again..