Hi there! We have plans to go to HK 2nd or 3rd week of June this year.

Hi, it will be very hot during that time, with the average temp of about 28C. In addition, as you mentioned, it does be during the typhoon season. Thunderstorm may happen from time to time. In my opinion, it is not a good time to travel then. In spite of that, because you only have that schedule, you can surely go there, packing summer clothes and rainy gear. You'd better pay much attention to the weather forecast.