Dang man, that is hot, but happy birthday to your brother. I have A/C, as most Wisconsinites do. It is set to 77-78.8°F (25-26°C) during the day, and 73.4-74.3°F (23-23.5°C) during the night on my smart thermostat, which has an eco/away mode set to 82°F. Luckily, my workplace is cooled, as I work a desk/lab job. In fact, the A/C is so cold there (set to 72°F / 22°C), I wear long sleeves.
Why is my A/C set so warm? Cos I get cold real easily and do not want to wear sweaters in the summer, it is eco-friendly that way with less CO2 emissions, and is cheaper. Best of both worlds.
So, your brother is in Phoenix? That place gets really hot.