Air conditioning question ('98 Boxster)

[Lordblood]

So my sister was fiddling around with the buttons in my '98 Boxster (I told her not to, but she was bored apparently). Anyway we came upon a button that made the air super cool, its the one between the up and down arrow buttons on the air conditioning controls (the one that flows air to your legs and windshield).

I was wondering if having this button on has any big effect on the engine, especially the engine temperature.

Also, I was wondering how I can beat these 90 degree heat with a convertible (I live in the desert so its dry). Maybe I should just wait a few months so the temperature drops to around 80 or 70 during the day.