Baylis paired his results with climate projections through 2099. As Earth warms, he predicts unfavorable mood swings—largely in cool states like Wisconsin and Minnesota. Since people might crank up the air conditioner to counteract rising temps, he hinted at climate change’s broader cost. “Would I be willing to pay a buck to have it be a 70-degree day?” Baylis wonders. A $1 isn’t much, but the beach might just be a cheaper option to beat the heat.