Short answer: it depends on the material, but a well-built outdoor bench made from weather-resistant materials can usually stay outside through winter without cracking. Freezing temperatures alone are rarely the problem. The real culprit is water. When moisture seeps into tiny pores, joints, or scratches and then freezes, it expands and slowly breaks the material apart. That freeze-thaw cycle is what causes cracks, splits, and spalling.
Honestly, freezing air alone does not crack most quality outdoor furniture. What causes damage is repeated freezing and thawing of trapped water. So the question is not just “how cold does it get,” but “how wet does the bench get before it freezes.”
Here is how different urban bench materials handle freezing temperatures.
Wood: Hardwoods such as teak, ipe, shorea, and white oak are dense and naturally oily, so they handle winter much better than softwoods. However, if water gets into the end grain, joints, or existing cracks and then freezes, even a good hardwood bench can split. Softwoods like pine or spruce are much more likely to crack. If you leave a wooden urban bench outside, make sure it is outdoor-rated, sealed or oiled, and not sitting in standing water.
Metal: Steel, aluminum, and wrought iron do not crack from normal freezing temperatures. Metal can become slightly more brittle in extreme cold, but typical urban winter conditions will not cause a metal bench to crack under normal use. The bigger risk is rust and coating damage. If the powder coat is scratched, water reaches the bare metal, freezes, and can lift the coating. Touch up scratches before winter.
Recycled plastic and HDPE: This is one of the safest choices for cold climates. High-density polyethylene and recycled plastic lumber do not absorb water the way wood does, so they are very resistant to freeze-thaw cracking. They may get a little stiffer in deep cold, but a good HDPE bench will not crack under normal use.
Concrete and stone: Concrete can crack if it is porous and saturated with water. Quality outdoor benches usually use sealed or air-entrained concrete, which is much more freeze-resistant. Granite and dense bluestone handle cold well. Softer sandstone and limestone can absorb water and spall or crack over time.
Synthetic wicker and rattan: Resin wicker over an aluminum frame is generally fine in freezing temperatures. Natural wicker is risky if it gets wet and then freezes, so it should be stored or covered.
To leave your urban bench outside safely through winter, inspect it before the cold sets in. Seal any cracks or exposed end grain on wood. Touch up scratches on metal frames. Keep the bench slightly elevated or place it on a permeable surface so water drains away. Avoid letting snow piles sit against the base for weeks. If the bench is not rated for exterior use, cover it or store it.
So can you leave an urban bench out in freezing temperatures without the material cracking? Yes, if it is made from a weather-resistant material like teak, powder-coated aluminum, HDPE, or sealed concrete, and if you do basic winter prep. If it is a cheap bench made from untreated pine, porous concrete, or natural wicker, I would store it, cover it, or expect cracks after a few freeze-thaw seasons.