The climate of Corner Brook can be described as semi-maritime and is well-suited to a wide variety of outdoor activities. Summers are warm but not hot - July mean temperatures are 17 °C, which is perfect for active sports like hiking, mountain biking or sea kayaking. Fall brings cooler temperatures and vibrant autumn colours which are in their prime around mid-October.

Winters are cool and snowy - according to Canadian Geographic Magazine, Corner Brook gets more snow than any other sizeable community in the country (averaging 400 cm). Mid-winter temperatures average around -6 C and this, combined with the abundant snow, means that downhill and x-country skiers or snowmobiliers can start their activities in mid-December and continue them until early to mid-April. Corner Brook's total precipitation is about 110 cm, most of it falling in the fall and winter. The spring and summer are the driest times of year in Corner Brook. At 49 °N, Corner Brook has 16 hours of sun at the summer solstice and 8 hours on December 21.

Check the Weather Office for Corner Brook's current and term forecast conditions.