home humidity levels
Ideal humidity levels. Humidity is the amount of water vapor in the air. The amount of humidity varies depending on the season, weather and where you live. Generally, humidity levels are higher in the summer and lower during winter months. Ideally, humidity in your home should be between 30 and 50 percent. Humidity that's too low or too high can cause problems. Low humidity can cause dry skin, irritate your nasal passages and throat, and make your eyes itchy.