You already made a thread about this. A humidifier will not noticeably increase the temperature for the snake. If will just increase the humidity.

You should be checking your temperatures with a digital probe and your humidity with a digital sensor. If you don't have thermometers then you need to get some.

You can run the humidifyer in the room with the snake and it won't cause problems unless the humidity is above 70% for a long period of time.