Weathering is the gradual wear that sun, wind, rain, and freeze-thaw cycles inflict on exterior materials. It’s what eventually fades and cracks paint, which is why prep and quality coatings exist to slow it down in the first place.
Every exterior finish weathers; the question is how fast. Quality prep, the right products, and a maintenance schedule stretch the life of a finish considerably, and catching early weathering signs keeps repairs small.