Rainfall patterns refer to the distribution and frequency of precipitation in a specific area over time. These patterns can vary significantly based on geographic location, climate, and seasonal changes. For example, tropical regions often experience heavy rainfall throughout the year, while arid areas may receive little to no rain. Factors influencing rainfall patterns include topography, temperature, and wind currents. Mountains can block moisture-laden winds, creating dry areas on their leeward side, known as rain shadows. Additionally, seasonal changes, such as the monsoon season, can lead to intense rainfall in certain regions, affecting agriculture and water supply.