I'm with Comms. I grew up in Southern California. You know, the place where it normally rains every 8 months?
Usually you know the rain is coming. So obviously then I would.
But, since I work indoors most of the time, I don't care about being a little wet from the door of the building to the car. If I'm cold, well, big deal. I'm still sheltered, the car has a heater, and worst case scenario I pull my space blanket or garbage bag out.
If I'm camping or something, then yeah, obviously.