[bobarian]

There is no place in the world with 80-90degree temps year long. They may have average daily high temperatures this high but it does cool off at night.

I assume you are asking with reference to beetles? Beetles need sustained high temperatures to hatch, most places cool off at night so even though it might get warm during the day the night time cooling will often go below the critical point.

Many of us(including myself) use wine coolers to keep temperatures lower. But I no longer plug in my wine coolers, I found it much easier to freeze all my boxes for 3-4 days before putting them in a cooler.