I'm keeping it on the terrace, rain can't reach it and there's plenty of fresh air for the miner to keep it cool. I've put it on the PSU because I noticed it absorbs some vibrations which you could otherwise hear in the room nearby during the night.
It's hashing 1.35-1.4Th/s (clocked at 425MHz), temps of the miner are about 42°C higher than ambient while hashing at that rate. 34°C higher than ambient at default clock. Which means I don't need to fear of hot summer anymore.

Really cool setup, looks like a better solution then usual horizontal placement everyone does.