Humidity is very low in the colder months and if humidity is to low it may result in nosebleeds and effect the overall comfort of the space, these are primarily used in northern states that get very cold in the winter. During the warm months, the opposite occurs, the AC dehumidifies the home from the summer’s higher humidity levels. ideal humidity in a home will range from 30-50% but should at least be below 60%, depending on the efficiency of the home.