I am looking for travelling Guangzhou 1-14 July . How is the weather during that time?

It is a little early to know the weather forecast, but according to the statistics of the past years, it can be hot then, and the average temp may reach 86F/30C or a little higher. You may meet cloudy days, but it is very likely to rain. Apart from summer clothing, it is best to prepare simple rain gear in case.