I am not sure why you want to do this, but I have noticed that in a group of people in cool (not cold) weather eg 5 C which is 41 F, those who live in places with a very cold winter (rural Ontario like me, Winnipeg) are not even zipping up their coats while those who live in year-round warm places (Texas) are shivering and complaining and borrowing gloves.
My theories about why that is:
- base clothing is warmer. Sure, we're all just wearing pants, shirts, shoes, and light jackets, but the Texan's shoes are thinner soled, his jacket is lighter, etc.
- those of us with cold experience are used to feeling a little cool and know it's not dangerous (unlike truly cold which is dangerous)
- we have some habits we might not even notice about the way we're walking or standing that keep us warmer by using muscle energy, or reduce the heat we're losing to the air
- our sympathetic nervous system is opening channels that the Texan's is closing, so we're pumping blood to our fingers and keeping them warm while his is throwing the fingers under the bus. US Soldiers apparently do learn some biofeedback thing to achieve this effect
I recommend acclimatizing to cool, not cold. Cold will kill you. Down to freezing is cool. I guess cold starts about -10C which is 14F. If you have access to cool, try just spending time in it wearing a little less clothing than you normally would. Leave off your hat or gloves or scarf. Don't zip up the coat. Wear the light jacket instead of the coat. Do this for short times - you won't die getting cold walking to get the mail in inside clothing when it's above freezing out. At 0C I will leave my coat in the car to go to the grocery store because it's annoying to wear with or deal with a large coat while shopping. And sure, I feel cold while I'm going through the parking lot. I just don't mind that much.
Figure out how to wave your arms around to drive more blood to your fingers, and how to jump up and down to drive more blood to your toes. If you're new to living somewhere where it gets cool and cold, watch what other people do at places like bus stops where you have to wait outside. (Even with full on hats gloves scarves etc, people get cold when they have to stand still. Watch how they deal with it.) Change the way you walk to make yourself warmer. And yes, learn to ignore the fact that you feel a little cool. Never ignore feeling chilled or cold - shivering is a big danger sign. I don't leave my coat behind at -10C. That would just be stupid. But cool? Lift up your chin. Tell yourself it's "bracing". Imagine a little glow in your cheeks and a sparkle in your eye. Look forward to hot chocolate. Think about skating, tobogganning, skiing, and all the other things that are fun to do outside and involve getting a little cold. Walk faster. Don't let it beat you. Then get into the warm house and really enjoy that warmth.