We are going to Canada in the early part of June - to Vancouver, Victoria and to Banff. How warm or not is it likely to be then? And what sort of clothes do we need to take with us? Footwear? I like to plan my holiday wardrobe early you see... 
Also, any recommendations of things to see and do? We are definitely going whale-watching, and will have a car when we are in Banff, but not in Vancouver or Victoria.