You could visit Vancouver and Victoria year-round as the winters in Southern BC are mild.
Summer months from April to October are best months for your BC visit. Always remember to carry umbrella as there could be rain showers anytime during the year.
If you are interested in winter sports like Skiing and snowboarding, then visit the Whistler Mountains during November to March time frame.
Vancouver, BC
Best time to visit
You could visit Vancouver and Victoria year-round as the winters in Southern BC are mild.