[1] Precipitation runoff and glacial meltwater from this mountain drains into tributaries of the Squamish River.

Amicus Mountain is more notable for its rise above local terrain than for its absolute elevation as topographic relief is significant with the summit rising 2,410 metres (7,907 ft) above the Squamish River in nine kilometres (5.6 mi) and 1,960 metres (6,430 ft) above Ashlu Creek in seven kilometres (4.3 mi).

[3] Most weather fronts originate in the Pacific Ocean, and travel east toward the Coast Mountains where they are forced upward by the range (orographic lift), causing them to drop their moisture in the form of rain or snowfall.

As a result, the Coast Mountains experience high precipitation, especially during the winter months in the form of snowfall.

The months July through September offer the most favorable weather for climbing Amicus Mountain.