Does humidity and temperature effect the sex of the plants?

Is there a way to increase the chances of my plants being female over male?.

I do remember a study that humidity, temperature and pH of the soil can effect the outcome of male to female plants when growing from "regular sexed"seeds, as opposed to feminized seeds. I don’t remember the details, I’ll have to get back to you on that.

Thank you and any other tricks you might know to help increase my chances for female plants is greatly appreciated.