Why do you lose your temper in winter?

The dry weather in winter in the north, coupled with the relatively low temperature, makes people easily fidgety and lose their temper. In cold weather, the whole person is cold, where can there be a good mood? Sleep curled up at night in the north because it's too cold. You don't have to sleep with a quilt, you'll catch a cold and have a headache. When there is no heating, it is MINUS 20 degrees outdoors and MINUS 15 degrees indoors. The countryside is not as densely populated as the city, and it is really extremely cold. With central heating, the indoor temperature can reach four or five degrees above zero, but it is not warm. I come from the northern countryside, and I suffer from repeated frostbite every winter. Not feeling well, in a bad mood. Of course, other places are not clear, but as long as it is not tropical and subtropical, it should be cold in winter. So I think it's normal for people's mood to be affected by the weather, so sometimes they have a bad temper.