does humidity rise to 2nd floor of a house. (is my second floor more humid becuase humidity rises?)?

Answer 1

You are correct. The warm air does rise to the second floor and caries humidity with it. However I believe you did not ask a question for the sake of getting an answer you already know.

I assume you have a problem with a central air-conditioning. If your second floor is significantly warmer there are a few thing you can do to improve the work of your air-conditioner.
1.Open all register on the second floor
2.Close doors leading to the second floor. If the architecture does not allow that close the doors to the rooms on the second floor and use a ceiling fan(s) do drive the humid air down.
3.Slightly close register downstairs to allow more air to go to the second floor.
4.Install (if you do not have already) an attic fan to get rid of heat in your attic.
5.Check insulation between the second floor the attic space.
6.If all fails check your AC system.

Let me know if it helps.
Good luck.

Answer 2

Your humidity level should be the same if the temperature is the same.

Temperature is the factor

Cold air holds less moisture and that is why basements are often damp.

Think of the weather,
Warm moist air from the south meets the cool dry air from the north and you get rain.

Answer 3

No humid air is more dense thefore heavier so if there are no variables in your house it should be more humid on the first floor something else is going on

Answer 4

If it is hotter upstairs it will be more humid. Hot air holds more moisture.

Answer 5

yes