Hello,Mr.Rajan
The best time to visit Hong Kong is from October to March the next year. Mid June is the summer time, hot and humid. The temperature can go up to 38 Centigrade. And there occurs storms and pours sometimes. But you can enjoy great discount if you during summer and also you can enjoy water activities in Disneyland and Ocean Park during that time. If you have made up your mind, donot forget to bring rain gear and outer coat.