Mac Pro in a hot country - bad idea?
Solution 1:
It gets 120+°F here during the summer sometimes, which is approximately 50°C. In the shade it'll be approx. 10-20° cooler, and indoors approx. 78°F with A/C.
The A/C doesn't run full time, so if you were to turn off your A/C while recording then turn it back on periodically, you should be able to maintain a reasonable interior temperature, both for you and the computer without it impacting your recording.
Plus, if you have good headphones, the only times you'd need to turn off the A/C is while using a microphone to record voices or acoustic instruments. Electric guitars and basses, amps, keyboards and synths should be going direct or be loud enough that ambient noise from the A/C shouldn't be a problem.
Solution 2:
From Apple's Mac Pro Technical Specifications:
Electrical and operating requirements:
Operating temperature: 50° to 95° F (10° to 35° C)
If your indoor temperature reaches 51˚C, that probably spells bad news for microprocessors. You might be in for a very costly climate control system if you need an acoustically isolated space.