It was probably 90 degrees today while working on my van. I had 2 of those Shumacher 120 AC to 12 DC converters (these http://www.amazon.com/Schumacher-PC-6-120AC-Power-Converter/dp/B0012BL8LG ) running my roof vent fan and my endless breeze fan on high and I was quite comfortable.
If I could...