Question:

As air temp. decreases, does relative humidity increase, decrease, or stay the same?

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As air temp. decreases, does relative humidity increase, decrease, or stay the same?

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  1. Actual humidity stays the same; saturated vapour pressure decreases; so relative humidity increases.

    Thus daytime hot dry desert air can shed dew at night.


  2. increase

  3. I'm pretty sure it stays the same, the humidity is only how much moisture is in the air right? So temperature, I don't think, has an effect on humidity.

  4. Relative humidity is a measure of the amount of water vapor in the air compared to the amount of water vapor that air can hold.

    As temperature increases, the air become hotter and expands.  This creates more spaces for water vapor to occupy.  The opposite is also true.  As air temperature decreases, the spaces available for water vapor also decrease.

    Therefore, provided that the amount of water vapor in the air remains constant, as temperature decreases, relative humidity increases.

  5. If the amount of moisture in the air stays the same, the relative humidity will increase.

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