Most outdoor heaters can be left out in the snow, but it's always best to check the manufacturer's instructions first. If you're not sure, err on the side of caution and bring your outdoor heater inside when it's cold and snowy outside. Some outdoor heaters are specifically designed for use in cold weather, so if you have one of these, you can feel confident leaving it out in the snow. However, even these heaters should be covered or otherwise protected from the elements when not in use. Outdoor heaters are a great way to enjoy your outdoor space even when it's cold outside, but be sure to take proper care of your heater to prevent damage.