How long before I stop wearing a coat?

I've come to Leeds for the weekend to acclimatise before we move here. The thing you easily forget about up North is how about 1% of the population wear coats, even if the temperature is about 10 degrees below Zero. But the fascinating thing is I USED TO NEVER WEAR A COAT EITHER. Back in the day, when Northern cities really were run down, I never wore a coat out, in January. So the moral of the tale is that non-coat wearing is a purely cultural phenomenon. I won't be able to get Northerners to wear coats, they'll infiltrate my softie southernised culture and persuade me not to wear it, in their subtle, influencing ways. But how long will it take?