What the existing connection tells
A good enclosure helps, but water often enters through a faulty cable entry, damaged gasket ring or an outdoor post that has been mounted on a tilted and wet mounting surface.
An outdoor post hangs outside and is exposed to rain, temperature differences, cleaning agents and sometimes direct sunlight.

A good enclosure helps, but water often enters through a faulty cable entry, damaged gasket ring or an outdoor post that has been mounted on a tilted and wet mounting surface.
Assess exterior materials, protection, drainage, and the location where cables enter. Also consider afternoon sun: heat and direct sunlight can affect both the screen and the camera.
Choose an outdoor post and mounting type that are intended for that location. Use a suitable construction or recessed box and let the cable entry be performed so that moisture does not run along the cable into the interior.
After installation, check the sealing, image under sunlight, and behavior after rain. Include the outdoor post in the maintenance routine if it is exposed to weather or heavy use.
No. Mounting, cable entry and drainage remain decisive.
Yes, assess sunlight immediately when choosing location and material.