As I've been to Vietnam recently, I can attest to their humidity and temp.
Imitate the conditions as you would in the montane forests and cave regions of Vietnam.
A relative humidity of 90% or above especially during nighttime should be maintained.
Daytime temps can be anywhere between 80-88F
Nighttime temps can be dropped as low as 65F during your summer season but can be maintained around 70-75F inside the tank.