What type of pressure system is typically associated with fair weather?

Fair weather is typically associated with a high pressure system. High pressure systems are characterized by descending air that inhibits cloud formation and precipitation, leading to clearer skies and stable weather conditions. As air descends in a high pressure system, the pressure at the surface increases, which generally results in a predominance of fair weather. Additionally, high pressure systems can often bring dry air and pleasant temperatures, making them commonly linked to nice weather days.

In contrast, low pressure systems are often associated with cloudiness, precipitation, and stormy conditions, as they encourage rising air that can lead to the formation of clouds and storms. Stationary fronts can create prolonged periods of cloudy or rainy weather, depending on their characteristics and the air masses involved. A trough, which is an elongated area of low pressure, typically signals a disturbance that can lead to unsettled weather conditions. Thus, the characteristics of a high pressure system make it the clear choice for fair weather.