Hot or cold?

I can sleep better when it's cold versus hot although I sometimes sleep with two blankets. I hate sleeping when I'm sweating. I remember on a road trip once I and my brother couldn't stand it because it was a 100 degrees and there was no air conditioning in the car. We couldn't sleep. We'd maybe fall asleep for five minutes but then wake up all sweaty and gross. We kept begging for a bag of ice. On the last leg of the trip just me and the owner of the car were left. We finally got that bag of ice and it felt like a life saver because traffic into Chicago was so bad (stop and go). I was so tired I couldn't eat, but the heat kept me awake so I was fine to drive.