The mag mount itself is waterproof, but the BNC connector is not inherently water-resistant. Over time, rain or moisture could seep into the connector, which might cause temporary issues until it dries out. However, corrosion could build up over time if the mount is left exposed to the elements for too long.

It’s important to remember that “weatherproof” doesn’t really exist—only “weather-resistant.” The BNC mag mount is designed as a temporary solution rather than a long-term outdoor option. If you need a more permanent installation, consider an NMO antenna, which is built for heavier use and greater weather resistance.