You can expect most solar security cameras to survive cold weather down to -4º F, but the sun's low angle in winter reduces charging efficiency significantly. Without as much direct sun, especially during December and January, your small solar panel may struggle to recharge the battery daily. To make matters worse, the battery probably won't charge below 32º F. (This affects even battery-powered cameras with a power cable.) If your camera loses a little more charge daily, consider bringing it inside to warm up and fully recharge. It's not convenient, but it will help keep your camera running.