Sativa strains (Thai, Colombian, Hawaiian, Mexican, Jamaican) naturally grow much closer to the equator than their Indica cousins and therefore will be more resistant to heat and humidity. However, I have found that keeping temps under control will be beneficial regardless of strain. Even equatorial breeds need cool night temperatures to reach full potency and yield. Try to keep your flowering temps below 29 degrees celcius and at least 5 degrees cooler lights out. It's best to also keep the humidity below 60% if at all possible.