Fire pits are weather resistant and the best models are going to have durable metals in their construction along with the weatherproof powder and enamel coating. This means that your fire pit will be safe for use even in relatively harsh conditions, but it's always good to take your fire pit inside if it's not in use. Rough weather will wear on the fire pit over time if it's always left outside, but you don't need to worry if it's stuck on the balcony during a storm every now and then.