We are thinking of going to qinhuangdao in the middle of July 2014. Can anyone inform me what the weather is like at that time.

The average temperature is around 20 to 30C during that time and sunny and the cloudy days usually occur.
For hotels, what is your budget? As I know, Shan Hai Holiday Hotel and Great Wall Hotels are pretty nice ones. If you want some cheap ones, Taolin Hotel and Bowei Great Hotel are suggested.