I live in/near the Smoky Mtns, lifetime average is slightly below 20. Thats since the truck was new in '22. I may drive a little aggressively. My Wife's is a '23 and hers is slightly above 21
If it's any kind of connector that may be prone to moisture...liquid tape....you can seal all the points of entry for moisture. I use posi taps and seal them if I don't solder and shrink wrap