This is an enclosure I created for holding small air sensors, such as the AHT10. It should be resistant to rain and slashes of water, while still allowing air to pass through.

It is a modification of Dankanism's "Threaded jar with lid", where I included an inner cylinder, vents, and drainage holes.

You will want to print it in a good outdoor filament, like ASA. I added a little belt loop to the side of it for mounting. I have mine hung under a tree, so it is in the shade, to prevent the sun from heating the container up and giving false readings. I would recommend using a cable gland on the hole in the bottom, to keep the cable secure and to prevent water from entering your cabling. And try to keep your sensor close to the top of the inner cylinder, to ensure it stays dry.

Creality

Ender-3 V3 KE

No

No

ASA

I started with Dankanism's "Threaded jar with lid". I added the inner cylinder and vents. The louvres on the outer vents are sloped outwards, and the inner vents are slowed inwards. The inner and outer vents are set 90 degrees apart. The idea being that splashed water would not be able to enter the vent upwards, flow 90 degrees around the circle, then go down through the second vent, then somehow go upwards again to reach the sensor.

Then I added the drainage holes, hole for a cable gland, and belt loop for hanging.