Although many people think you can catch a cold by not dressing warmly enough in the winter and being exposed to chilly weather, it's a myth. The common cold is spread when you inhale virus particles from an infected person's sneeze, cough, speech, or loose particles from when they wipe their nose.
Similarly one may ask, can you get a cold from the cold weather?
In terms of infectious illnesses, germs make you sick, not cold weather itself. You have to come in contact with rhinoviruses to catch a cold. And you need to be infected with influenza viruses to contract the flu. Rhinoviruses peak in spring and fall, and influenza viruses peak in winter.
Can you get sick from the cold and wet?
A wet head can make you sick. You'll probably feel chilly if you skip the blow-dry on a cold day, but not much else will happen. Again, colds are caused by a virus. Unless you are so cold that you get hypothermia, which could make you susceptible to infection, wet hair or clothes won't increase your vulnerability.