[nzadrozny]

Or, along those lines but less world-dominating, "Sorry for [choosing a time and location for our meeting that resulted in exposing you to] the rain."

Same point, though. The superfluous apology lends an implied sense of influence and responsibility.

[noonespecial]

Or even an implicit acknowledgment that I do indeed have the power to call you out into the rain.

[sandieman]

I'm sorry for this thread. Can I borrow your phone?