The rainfall picks up more and more dust on the way down and when it evaporates from your car, the dust is left behind. Rain drops contain many substances, including fertilizer particles from the Great Plains, and microscopic salt crystals left over from when ocean waves..
In respect to this, why does rain make cars dirty?
Rain makes cars dirty, according to UW-Madison atmospheric scientist Steve Ackerman, because "the air near the ground has all kinds of particles floating in it: pollen, pollutants, dust, smoke, etc." So, after the rain wets your car and then dries up, it leaves behind these particles on your car," Ackerman said.
why did it rain dirt? The answer is that it was caused by strong winds blowing across hundreds of miles of terrain — including huge tracts of land being plowed as part of spring planting. The winds sent dirt (and some pollen) airborne — and it fell, being washed from the air by Friday night's showers.
Regarding this, is there such thing as dirty rain?
Apparently, this is actually a thing. According to Our Quad Cities, it's called "dirty" rain. It didn't just hit the Quad Cities though. Before the storm hit us, It actually did some damage in the South and West as well.
Does rain clean the car?
The answer is no. Rainwater can only provide a light rinse that only creates mud and streaking. Even a strong rain does not have adequate pressure to remove dirt and there will always be a layer of grime that the rainwater won't be able to dislodge. Rain alone can not make a car clean.
Related Question Answers
Is it bad to wash your car every week?
Washing your car is extremely important. Many auto detailing and car experts recommend washing your car once a week to successfully prevent contaminants from damaging your paint and finish. You may worry that it is too expensive to wash your car every week.Can you wax car too much?
Waxing too much will eventually cause build up and clouding. If you are using a paste wax on your brand new car, it will damage the factory clearcoat. However, synthetic car wax will not hurt the paint or clearcoat, only many layers of synthetic will start to cloud over time.How often should I wash my car?
The general rule of thumb is to wash your car every two weeks or so. Of course, there are special circumstances that might increase or decrease that frequency. If you live in a part of the country where some of the aforementioned hazards are quite common, you'll need to wash your vehicle more regularly.How often should I detail my car?
Most experts recommend a new detail every four to six months, which equates to 2-3 times a year. However that's just a rule of thumb, and your detailing frequency should depend on both your car and the type of person you are. Obviously, the more often you have one done, the better condition your car will be in.Is it bad to wash your car every day?
Frequent, even daily, car washes do not damage your car. However, the damaging part of washing a car frequently is the constant use of rubbing materials, particularly during the drying process. Dry rags are particularly damaging because they rub micro particles across the paint which cause scratching.Should I wash my car before rust proofing?
Cars that are used on rough and muddy roads are more vulnerable to rusting than those that are driven on roads that have tarmac. In fact, it's advisable you first wash the undercarriage of your car with pressurized water as it helps in ensuring that you don't rustproof on top of either dust or mud.Is it cheaper to wash your car at home?
Washing your car on your own is very affordable. You do need to pay for the equipment, such as the soap, sponges, and microfiber cloth. Your water bill may increase slightly, depending on how much water you use to rinse your car. However, in the long run, self car washes are still cheaper than commercial car washes.Should I wash my car today?
Most experts recommend washing your car every two weeks or so throughout the year as a general rule. Same goes for dead bugs and tree sap, so they should be washed off as necessary. Your car can go longer between washes depending if you don't drive it every day, or you keep it in a garage and out of the elements.What is mud rain?
mud rain. Rain containing a noticeable concentration of particles of sand or dust that may originate from very distant regions. Compare blood rain, sulfur rain.What causes blood rain?
In the 19th century, blood rains were scientifically examined, and theories that dust gave the water its red colour gained ground. Today, the dominant theories are that the rain is caused by red dust suspended in the water (rain dust) or by the presence of micro-organisms.Will rain wash salt off car?
Rain may wash away some of the salt, but the residue it leaves behind is just as damaging. When it rain, it is also warmer outside, and salt actually eats away at a car's exterior faster in warmer temperatures.What happens if you never wash your car?
In the short term, not washing your car regularly won't affect your expenses. And dirt isn't the only (or worst) thing that regularly lands on your car. Bird droppings, acid rain, industrial pollutants, sap from trees, and those aforementioned dead insects all damage paint over time.Do I need to dry my car after it rains?
Drying rainwater off a car is not quite as simple as you'd think. Unless the car is perfectly clean underneath, you cannot dry the car off without installing tons of swirls and scratches in the paintwork. Wiping a car down after the rain is a surefire way to scratching and swirling the painted surface.Can I wash my car at night?
It is always better to wash you car out of the direct sun. So if you wash your car either at night, or in the shade you have the chance to dry your car completely with a dry lint free rag, before the sun has a chance to do it.How do you clean a car after it rains inside?
You can then use white vinegar. Because it's an acid, it will burn the mold and its spores. Mix eight parts white vinegar to two parts water in a spray bottle and spray over the surface until its very damp. Let the solution sit for 15 minutes, then use a wet/dry vacuum to speed up the drying process.How do you wash your car in the winter?
Whether washing the vehicle at home or at a car wash, use fresh water and a high-pressure hose. If washing at home, add baking soda to the wash water in the winter o help dissolve dried salt on the vehicle's surface. Warm, soapy water (not dish detergent) and a sponge or wash-mitt can be used. 
Matthew Sanders 
