Will the atmospheric pressure be less or more during dry weather, why?

Question

Will the atmospheric pressure be less or more during dry weather, why?

Answer 1

Atmospheric pressure is almost always higher during dry weather.  This is because in order for rain to develop, air must rise and condense into rain drops.  When air is rising, it is lighter, therefore you have lower atmospheric or "Barometric" pressure.  When air is sinking it is drying out and heavy causing higher barometric pressure.

Answer 2

Atmospheric pressure tends to be higher during dry weather because of high pressure systems. In order for precipitation to occur, low pressure is needed because moisture must be able to rise up into the atmosphere, and once enough moisture gathers up there, then you will get precipitation. However, when there is a high pressure system, the atmospheric presure is too high in order for moisture to go up to the atmosphere and it is harder for clouds to form, and that is why high pressure systems bring dry weather.

Answer 3

warm air is lighter than cooler air ,because the air molecules are more densely packed in cooler air so more air per square inch than warm air,as air warms the molecules push farther apart,so less air per square inch,but there are water molecules in there too,and warm air can hold more water than cold air,so i don't know ...........tom