Because it's not a heater.
During the summer,the heat causes the water in the ocean to evaporate quicker than in the winter. The water forms clouds which get heavy and it pours.
A heat pump acts as a furnace in heat mode to warm the home in the winter, then acts as an air conditioner in the summer to cool the home.
Thermal efficient curtains keep heat in during winter.
The cold in winter causes the humidity to drop by condensing it out. The heat in summer can cause the humidity to rise by evaporating more water from nearby bodies of water.
An electric heat pump can heat up your home during winter and cool it during summer.
You will be cold in the winter and hot in the summer. If you heat your house, all the heat will escape. If you use an air conditioner, all the cold air will escape.
body heat.
blue
Polar bear fluff up their fur in winter to trap the heat from its surroundings and they do not allow heat to pass.
Using more heat during the winter.-APEX
An air conditioner blows out heat
Any heat you got by running an air conditioner in winter would be from the compressor motor, which gets hot because it is using electrical current to do work. In normal warm-weather operation an air conditioner compresses refrigerant, then allows it to expand rapidly, producing a cooling effect. The cooled refrigerant travels through tubing and warm room air is blown past the tubes, which cools the warm air while warming the refrigerant. The warm refrigerant flows outside where it dumps some heat before being compressed and cooled again. Air conditioners dump heat gathered from a warm room. They do create some heat from the electricity they use. If you are trying to heat a cold room, you'd be better off putting the electricity to use running a space heater of some type.