Some robot mowers work perfectly well in all weather conditions, including rain. This is a must-have feature if you live in an area known for its frequent showers. Fortunately, even if your mower isn't compatible for wet weather mowing, it should still come with a sensor that will send it back to its base when it detects rain. The convenience of this is that either way, you don't necessarily need to sit around at home to keep an eye on your mower.