What about the camera when the weather is too cold?

The so-called damage of moisture to cameras and lenses is mainly caused by the growth of mold, commonly known as mildew spots. Generally speaking, when the temperature is lower than 10℃ or the humidity is lower than 60%RH, the mold will stop reproducing. The safest way is to buy a camera moisture-proof box. Most electronic moistureproof box can automatically control the humidity in the box to ensure the dryness of the camera and lens. Another simple way is to buy a locked plastic box with a suitable size, and put desiccant and hygrometer (available online, cheap) in it, which can be used to store cameras and lenses, which is equivalent to a simple moisture-proof box, just don't forget to check the hygrometer frequently and change the desiccant regularly.

In fact, if you live in dry areas in the north, moistureproof box is not an absolute necessity; On the contrary, if the humidity in the south is high, it is necessary to take necessary moisture-proof measures for the camera.