Mountains play a significant role in influencing weather patterns due to their impact on air flow and precipitation. When air approaches a mountain, it is forced to rise, leading to cooling and condensation, which can result in cloud formation and precipitation on the windward side of the mountain. This process is known as orographic lift. As the air descends down the other side of the mountain, it warms and dries out, creating a rain shadow effect where the leeward side of the mountain receives less precipitation. Additionally, mountains can act as barriers to air masses, causing them to be deflected or blocked, which can affect wind patterns and the distribution of temperature and moisture in an area.