Well Tylus, to each his own. Here in Fl. we're no strangers to rain, and it's much more intense than those Northwest daily drizzles. It's usually wind driven and comes in at an angle rather than straight down. Same goes for the heat, as we have more than our share of 90+ degree days. I just leave the windows up and run the defrost or a/c as needed. When the truck sits in the sun for an extended time, I'll roll down the windows for a few minutes and crank up the a/c, letting it drive the hot air out. A white truck and tinted windows helps too.