Check out this fun post from Lifehacker about scientific basis and 8 common old wives tales.
I like the item on whether being cold can make you catch a cold. Chinese medicine worries greatly about people getting cold because it makes them vulnerable to all kinds of health problems (not just respiratory colds). Illness can is often a right-place-right-time sort of thing. Imagine being stressed, under slept and eating poorly, something that all of us occasionally experience. In this scenario, I would not be surprised to hear that a patient has also caught the latest cold going around, particularly if they tend to under dress for the weather. Think about yourself at final exams, the holidays or perhaps on a work deadline.
According to this post, science confirms that being cold can make you more vulnerable to catching a cold, but it doesn’t always result in a cold. Not everyone is going to get sick when they get cold and rundown, but the odds are higher that they will.