Nate Silver has a deal for global warming skeptics. Keep temperature records in your hometown and compare them with stats for average temperatures recorded at Weather Underground.

When temps fall, he pays you. Temps rise, you pay him.

The prize, $25 a day.

Some restrictions apply.

Eligibility will remain open through Monday (the 20th). Limit three contestants within any one 100-mile geographic radius.

As of today there are no takers.