As I live 118 miles to the south of British Columbia's capital city, Vancouver, I can answer that.
The answer is never, and especially not in June, when it was typically overcast and rainy. It was a running joke amongst the local weathermen as to whether the sun would even come out at all for the 4th of July.
That said, 90f/32c days were also a rarity, even in August. No longer the case.