Some of us check the weather report before washing the car.

Some rules in the South:

If you want it to rain, wash your car.
Trailer parks spawn tornadoes.
Grilling is different than barbecuing.

I run my car through the car wash weekly regardless of weather. The salt residue is terrible to leave on the car and i can't see out my windows if i don't clean the salt off the glass immediately.

My car could do with a good wash, but will I do it. Probably not. It rains two drops or five and then the wind start and it gets filthy. I think I wait for autumn.

Worst case: One time I spent a couple of hours on a nice sunny day, not only hand washing, but also waxing my truck. This was a most unusual event, since I tend to rarely do more than run it through a car wash. All proud of my handiwork, I set off for a destination, I no longer remember. I was traveling at highway speed down the four lane, when I suddenly realized I was passing the exit I wanted to get off! So last minute, a quick move over to the ramp, right through an enormous mud puddle where the road spit! Mud flew everywhere! My shinny truck looked ten times worse than it did in the morning before I spent hours of sweat cleaning it up! ? Needless to say, there have been even less hand washing let alone waxing since. Drive through is plenty clean enough, and I get a free wash coupon at my dealership every time I get it serviced, so win/win!

I drive a half a mile on a dirt road before I get to my house. Rain brings mud splatters, sunshine brings dust film, and as science has proven it always rains the day after I wash my car. White cars fare
best but my son just gifted me with a used Prius and it's dark gray. I don't think there will be a shiny clean car in my future very often.

I thought that this much documented law of nature was understood by all.

Don't feel bad, it happens to everybody. But you gotta scrape the salt off at some point.

I'm pretty sure this could be scientifically proven....

In Syracuse, I don’t wash my car all winter.