Yes, it's possible to use your rack in cold temperatures, but there are some precautions to keep in mind. When you remove your rack after using it in the cold, you'll need to warm it up again to nearly room temperature before the rubber becomes pliable enough to create a solid seal on the mounting surface. Additionally, in warm weather, it's advisable to moisten the sealing edge of your rack before attaching it. However, please avoid doing this in freezing or near-freezing temperatures, as the vacuum cup can freeze to the car's surface, hindering the proper functioning of the vacuum pump and check valve. Furthermore, if you clean your car in cold weather, ensure that it's thoroughly dried before attaching your rack.