Best Humidity Level for a House
Understand comfortable indoor humidity ranges and when a house may feel too dry, humid, or musty.
Last updated: May 2026
A common comfort range
Many homes feel comfortable around 30% to 50% relative humidity. Lower levels can feel dry, while higher levels can feel sticky and may make damp rooms smell musty.
Basements need attention sooner
Basements often run cooler, which can make moisture problems more noticeable. If basement humidity is regularly above about 55%, use a dehumidifier, drainage improvements, or ventilation checks.
Measure before changing equipment
Use a hygrometer and check several times of day. Short spikes are normal, but persistent high humidity deserves more attention.