Yes, a single-rope lifting system can be used both indoors and outdoors, including in cold weather conditions. However, it's crucial to consider the specific requirements and limitations of the system and the environment. Cold temperatures can affect the strength and flexibility of the rope, as well as the performance of other components like motors and hydraulic systems. It's essential to use appropriate materials designed for low-temperature operation, ensure proper maintenance, and follow safety guidelines to prevent damage or accidents. Always consult the manufacturer's recommendations for operating in extreme weather conditions.