Why does British Columbia have such varied landscapes and climates?

British Columbia’s diverse landscapes and climates are primarily the result of its complex topography and its position along the Pacific coast.12

Topography and Climate

The province lies almost entirely within a vast cordillera system, featuring major mountain ranges such as the Coast Mountains and the Rocky Mountains. These mountains act as a significant orographic barrier to prevailing winds from the Pacific Ocean. As these moisture-laden winds encounter the ranges, they release heavy precipitation on the windward slopes, while creating rain shadows in the interior valleys. This process leads to dramatic variations in rainfall, ranging from some of the wettest regions on the continent along the coast to much drier conditions just a short distance inland.314

Temperature Variations

The province's temperatures are influenced by the Kuroshio (Japan Current), which moderates the coastal climate, keeping winters mild and summers cool. In contrast, the interior regions—separated by mountain ranges—experience more extreme seasonal fluctuations, including hot summers and cold winters, with conditions becoming increasingly severe toward the northern interior and the Peace River country.1