What is the definition of a wifi thermostat with humidity control? A wifi thermostat with humidity control is a device that is used to regulate the temperature and humidity of a space. It typically contains a sensor that can detect changes in the temperature and humidity, and will then adjust the settings accordingly. This device is typically connected to an internet router, allowing for remote access and control of the temperature and humidity. The user can adjust the settings from any device that is connected to the internet, such as a smartphone or tablet. Additionally, the wifi thermostat can also be programmed to maintain the optimal temperature and humidity in the space. This is especially useful during the summer months when the temperature outside is high and the humidity is low. The wifi thermostat can help to maintain a comfortable indoor environment while keeping energy costs down.