Why does it feel cooler at 90°F when the relative humidity is 30% compared to the same temperature and the relative humidity is 80%?

Question

There is no real difference because the temperature is the same.

Because the lower humidity brings down the temperature.

Because the drier air evaporates moisture off your skin more easily.

Because there is less air movement at 80% humidity.

Answer 1

The correct answer is: Because the drier air evaporates moisture off your skin more easily.

When humidity is lower (30%), the drier air allows sweat on your skin to evaporate more efficiently. This evaporation helps cool your body down, making the air feel cooler than it would at a higher humidity level (80%), where the air is more saturated with moisture and sweat doesn't evaporate as easily. As a result, you might feel warmer and more uncomfortable at higher humidity levels despite the actual temperature being the same.