The rain forests west of the Western Cordillera Mountains on the Pacific coast of British Columbia make up the wettest vegetation region in Canada. The region regularly averages more than 8.2 feet of precipitation per year, raining as many as 240 days of the year.
The coastal rain forests of British Columbia receive so much precipitation due to their location. The ocean currents bring moisture and warm temperatures to the Pacific coast where the Cordilleras stop them from going further inland and shower the coastal area instead. The mountains force the air to circle upwards and then descend on the coastal region again, a phenomenon that creates an unusually moderate climate for the region's latitude that's rich in rain, moisture and humidity, which is perfect for dense forest growths of both deciduous and coniferous vegetation.