The Coast Mountains are an effective barrier to the moist westerly air flow. To the east of this mountain chain, on the Interior Plateau, there exists a much drier and more continental climate. The valley bottom localities are semi-arid with warm summers and cold winters, like those found in the Grand Forks or Cranbrook area. The northern half of the province has much colder winters and cooler summers. The winters in Northern BC are generally colder, and drier, the further north one travels.
Summers are short and quite cool.
Generally speaking, November and February are the two wettest months in coastal British Columbia. Cold weather blankets much of the BC interior from October to April, with northeastern BC frequently cool and overcast through July. The best months to travel here are August and September, after the first frosts have brought an end to the insect season. All Rights Reserved.