The amount of power your solar energy system can generate is dependent on sunlight. Whether it is 40 degrees out or 80 degrees out, the solar panels will still generate energy. When its gets really cold and starts to snow, if your panels are covered in snow they can’t produce electricity. Snow generally isn’t heavy enough to cause structural issues with your panels, and since most panels are tilted at an angle the snow will slide off. If snow does accumulate, it might be a good idea to hire someone to clear the snow off so your solar panels can generate energy again.
During cloudy weather, your solar panels will produce slightly less energy, and no energy at night. But as far as the temperature goes, it is not a factor in the solar panels generating energy.