@Carver Every weather is ideal for bare belly xD only sometimes crop top alone is not enough ;) [media=https://photos1.similarworlds.com/00/00/00/00/01/34/99/78
So maybe try wearing some thick warm cropped sweater (or even two layered) and open your winter jacket/coat only for a short time and then when it starts to feel uncomfortable close it to get warm and repeat that during your entire stay outside during cold weather xD And of course try to stay warm in all other areas besides belly, so wear cap, scarf, gloves, warm boots etc. also to make it more doable show just a few centimeters of bare belly between your pants/skirt and crop sweater, not your entire belly :)
This might be good compromise for you to show your belly a little and at the same time stay resonably warm during winter :)