I live in California and have many ethernet cables running over the roof. Cheap stuff and expensive stuff only last one summer before flaking in the sun and heat. However, this stuff has not failed after the 3 years we've used it.

https://www.amazon.com/trueCABLE-Outdoor-Shielded-Resistant-Ethernet/dp/B0854CPT3Q/ref=sr\_1\_6?keywords=uv+rated+cat6&qid=1637108981&qsid=130-0928500-3398517&s=electronics&sr=1-6&sres=B079LJDM57%2CB07JVFWJ8G%2CB08546BD6N%2CB0854CPT3Q%2CB097GQ6GQ7%2CB081G6Z55Q%2CB087Q56TL6%2CB08SWQSQ2V%2CB00BAXRQ3K%2CB01JAVMVQ0%2CB01JAVMYLM%2CB074JXFV92%2CB06ZZ1SKD6%2CB07FNNHDVJ%2CB095Y75YVJ%2CB079LBG7TP%2CB095XLFMNS%2CB00AWQ13R6%2CB07NF9YWNZ%2CB0745YVX25&srpt=ELECTRONIC\_CABLE