Question

What does 50 percent humidity mean?

Answer 1

50% relative humidity means that the air can hold 50% of the actual amount of water vapour air can hold before being saturated at that temperature

Answer 2

Relative Humidity. You've probably heard about relativehumidity in weather reports. This is the amount of water vapor in the air relative to what the air can hold. ... So the relative humidity is 50%, whichmeans the air contains about half of the total water vapor it could possibly hold.