The long-term average of weather conditions in a specific region, typically over a period of 30 years or more, constitutes the prevailing atmospheric pattern. This encompasses temperature, precipitation, humidity, sunshine, and wind patterns. It is distinct from weather, which refers to short-term atmospheric conditions. An example is the Mediterranean region, which generally experiences hot, dry summers and mild, wet winters; this annual pattern, observed over decades, is considered representative of that area.
Understanding these prevailing conditions is crucial in human geography, as it profoundly influences human activities and settlement patterns. Agricultural practices, housing construction, transportation infrastructure, and even cultural adaptations are often directly shaped by prevailing atmospheric patterns. Historically, certain civilizations flourished in areas with favorable growing seasons, while others developed unique strategies to survive in harsh environments. Analysis of long-term atmospheric trends aids in predicting future resource availability, potential challenges related to climate change, and the vulnerability of populations to extreme weather events.