hi, may l know what is the weather in mid of april? what should i wear during the trip?

It is the Spring time in mid April in HK. The weather tends to be warm and humid, accompanied by fog and drizzle. The average temperature is 18 C (64 F) to 25 C (77 F). As it turns a little bit cold at night, you should take long-sleeved T-shirts and light coat as well as rainwear.