At what point is the atmospheric pressure considered to be high or low?

I am working with a program that I want to inform the atmospheric pressure level at atm and if the pressure is high, low or average in a certain location, but I have not found anywhere on the internet that can give me an idea of how to calculate this. Could anyone tell me at what level of atmospheric pressure it can be considered low or high? is there any specific point? Do I need some more information to calculate this?

• If you are looking for an absolute high low or average it is not there. You simply plot all the points on a map and look at the lowest for a particular area (can be fairly large or small). Then look in that area for the highest and lowest – gansub Dec 2 '20 at 7:34
• The effects of pressure will be dictated by relative, rather than absolute, pressure. An area at 1.1 atm might be a high pressure zone if it's next to a region that's at 1.0 atm, but it would be a low pressure zone if it's next to a region at 1.2 atm. This is why a barometer is typically described as rising or falling (describing relative changes in pressure), rather than simply reporting the numerical value of the pressure in isolation. – Nuclear Hoagie Dec 2 '20 at 17:19