Daniel Prince wrote:

How long do RG-6 cables that are not exposed to direct sunlight
usually last?

How long do RG-6 cables that are exposed to direct sunlight usually
last?

Maybe Belden, a big manufacturer of cable, has that information, but
black RG-59 coax cable seems to last at least decades in sunlight (I'm
in Arizona); I don't know about white cable. Apparently cables are
more vulnerable to moisture and mechanical stress than anything else.
There are waterproof connectors, but electrical tape also does a good
job of sealing them, and at least the black 3M brand also lasts
decades in the sun.