A lot of outdoor furniture is made of a sturdy plastic, steel frame, or wicker material that can withstand heat as well as the cold. The nice thing about outdoor furniture is that it's usually made to get wet too, so you don't have to worry about it getting splashed on from the pool or soaked in a rainstorm. The main thing to consider when worrying about weather is things like couch cushions and rugs that might fade or get discolored in severe weather. You should always consider applying protective sealants to your patio furniture each year to make it as weather-resistant as possible.