The ideal humidity level for a home is between 30% and 60% . However, the ideal level within this range will depend on the time of year, what kind of clothes you’re wearing, and where your family is naturally comfortable. In colder months, the optimal indoor humidity range is 30% to 40% . If the humidity level is lower than that, it can cause problems such as dry skin, static electricity, and damage to wood furniture and floors. On the other hand, if the humidity level is higher than 60%, it can encourage the growth of mold and mildew. To ensure that the humidity level is within the ideal range, it is recommended to use a device that can measure humidity, such as a hygrometer. Smart thermostats can also display the humidity level in your home, but they cannot control it. It is important to note that older wall humidistats may be inaccurate with their readings.