If I rephrased the comment you just quoted I'd make that more clear.
If you were to move your barometer outside to a cold wet climate from indoors in a dry heated environment, temperature would be the biggest factor in any change in the reading you get. Vapor pressure would be secound. Yes, that would indicate a need to recalibrate rather than a specific change in the atmospheric pressure.
Yep, I opened the front door and the danged vapor pressure of water blew me right out into the yard! ;^)
Peace.