"Humidity conditions" refers to the amount of moisture or water vapor present in the air. It describes how moist or damp the environment feels. Full definition
Try and maintain stable humidity conditions in your home. (structube.com)
This is due to the high exterior humidity conditions which occur during the cooling season. (buildingscience.com)
Interior insulation reduces the beam end temperatures, reduces available drying potential, and results in higher relative humidity conditions in the beam pocket: all of these factors pose a greater risk to durability. (buildingscience.com)