Why does it feel hotter when it's humid?
The relative humidity plays a large role in determining our comfort level. If the relative humidity is 100 percent, it means that water will not evaporate -- the air is already saturated with moisture. Our bodies rely on the evaporation of moisture from our skin for cooling. The lower the relative humidity, the easier it is for moisture to evaporate from our skin and the cooler we feel.
The relative humidity plays a large role in determining our comfort level. If the relative humidity is 100 percent, it means that water will not evaporate -- the air is already saturated with moisture. Our bodies rely on the evaporation of moisture from our skin for cooling. The lower the relative humidity, the easier it is for moisture to evaporate from our skin and the cooler we feel.
Charles Mims
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