Can some1 tell me about how much precipitations makes a zone humid, dry, etc?

Question

Or tell me where to find information about it?

I meant, how much precipitations makes a zone to be considered as humid, dry, etc. I think it's obvious that precipitations don't make a zone to be dry, don't you think so? <.<

Answer 1

Unfortunately this is rather complicated, because it depends on things like what the average temperature is and what season the rain falls in. There are many climate classifications, but the one that's most popular is called the Koppen classification (there should be an umlaut on the "o," but I have no idea how to make one). You can find a pretty nice description of it on Wikipedia, at http://en.wikipedia.org/wiki/Koppen_climate_classification

Answer 2

It's the exact opposite.

Precipitation is only caused by humidity in the atmosphere. Humidity is the amount of water vapor in the atmosphere and when it's humid there's large amounts of water vapor and then clouds form and if there's too much water vapor the atmosphere can't hold it so it falls depending on the air temperature it will fall as either rain or snow.

Precipitation also doesn't make an area dry. Again, it's the exact opposite. If the atmosphere is dry that means that the atmosphere doesn't have enough water vapor for precipitation to fall or in some cases it's so dry that clouds don't form.