automatic roll-down due to temp

I thought this would be a cool feature: Upon pressing unlock from your keyless entry, if the cabin temp is above a certain degree, it would roll your windows down. I already have a window module installed (set to roll down), but I guess I would need to reverse the polarity and then activate it, right? Anyone have any insight? What kind of thermometer could I use?

What if its hot and raining?

haha, good point. I've also thought about a rain sensor too. I think it is a thread in this forum. People suggested a simple collection cup with two leads in it which would 'short' when there is water present.