How does an increase in humidity affect the dry bulb temperature?

In the context of air temperature measurements, the dry bulb temperature refers to the air temperature measured by a regular thermometer. Importantly, it is not affected by the moisture content in the air. An increase in humidity indicates more water vapor in the air, but this does not change the dry bulb temperature itself.

While humidity can make the air feel warmer or cooler due to its effects on evaporation and heat transfer, the measurement of dry bulb temperature remains constant regardless of moisture levels. Therefore, the correct answer indicates that humidity does not impact the dry bulb temperature, regardless of fluctuations in perceived temperature caused by humidity factors.