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

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.