Do you find your boots to be waterproof? Some leather boots are waterproof, which means your only issue may be the weather, but that can easily be fixed by wearing wool socks (I wear two on each foot if it's very cold and I'm not wearing winter boots). Also, it depends on what you plan to do. If you will rarely walk outside other than from your home to the car or to the bus stop and from the bus stop to your work/school/mall/movies, etc. then you may be fine with those boots. I have friends (all immigrants) who do not have winter boots, just wear the same they use during fall, but with thicker socks. If you plan on walking outside regularly, practicing sports or activities in the snow, or playing with your children in the snow, you will need winter footwear because it will keep your feet dry and warm. Trust me, you do NOT want to have wet feet during winter. It is dangerous.