Well, in Vancouver, it always rains. It rains when you're camping, when you're at an outdoor wedding, when you're having a company picnic... you just live with it
One time my ex led a field trip up to Mount Meagher in BC and it snowed the entire time. Got up in the a.m. and everything was frozen solid, frozen to the picnic table, frozen to anything and everything. There were a lot of unhappy students that day!
Not fun, but if we don't go in the rain, we can't go at all. Not that it always rains - just that we expect it (and we're often not disappointed).
It's the bug bites and rain dribbling down the back of your neck that get me. Plus, if you don't have a lantern for the tent, you're hooped.