They might also overheat or ignite the propane. Still, it’s worth taking a few extra precautions no matter what the weather’s like outside. Theres no danger of propane freezing, even when temperatures drop to subzero degrees. · never store your propane tank near air conditioners, radiators, or heat vents since they could pull the gas into your home. Simply allow your tank to adjust to ambient temperatures before use. You can keep your propane tank outside in the winter. • rust, corrosion, snow, and ice may damage the tank and release flammable propane. · whether youre done using your propane gear for the season or still plan to fire up that grill once in a while, theres good news: · storing a propane grill tank for the winter is usually as simple as leaving it in its grill or fire pit cabinet until you’re ready to use it again. · while cold temperatures can affect pressure levels, this doesn’t compromise the safety or functionality of the tank. • never store propane tanks indoors or in attached garages. · key points • propane tanks can be stored outside in winter , but only in sheltered, ventilated locations. · while it is possible for moisture and condensation to freeze on the tank ’s exterior , the propane inside remains unaffected as long as the tank is used regularly and kept at an appropriate level of fuel. We explain why it is safe to leave your propane tank outside in winter and when it is actually dangerous. As a matter of fact, you should absolutely keep it outdoors and never inside. Make sure the gas valve is in the off position. · as long as you store them properly, propane tanks can be left outside all winter.