1. wet weather
2. you do what to water to get it into a glass
3. a question of what time

1. The third time's the charm (sarcastic version)
2. Things can always get worse
3. If you're going to do something at all, why no do it to the fullest.

This expression comes from that sense of cynicism that one may get when the realization comes that the world seems to be sending all bad things and very little good if any at all. And if something bad comes, it won't come alone.