There’s a lot of information (and misinformation) out there about evaporative coolers and whether or not they work. The short answer: they do, if used correctly and in the right climate.

This is similar, but acts more like an evaporative cooler (not really a traditional air conditioner but it does the job ... of a simple system to work it, and it can reduce the temperature ...

Unlike a swamp cooler, installing air conditioning is a more difficult and lengthy process, but can be used in homes in both humid and arid climates. Although they do tend to dry the air.