Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Barometers actually work by measuring how much pressure is in the atmosphere. Now with a couple of calculations and through the miracle of science a barometer becomes the weather mans best friend. Look here for more information: http://www.paddlinginstructor.com/articles/how-stuff-works/491-how-do-barometers-work.
