We are going in Hongkong, 2nd week of June? Is it rainy this time if the month?

The temperature may range from 80 F to 90 F during that period of time. It would be hot and humid. Several showers may bring some cool feelings. But it won't influence the sightseeing a lot. Generally speaking, the park will still open on rainy days. You can keep close attention to the lastest news before going there. Have fun!