From Mother Jones:
Climate scientists, of course, have been predicting global warming trends for quite a while. So how do their models compare to the predictions made by people who have to put their money where their mouths are? Pretty closely, it turns out. Here, for example, is the predicted number of “cooling days” (i.e., hot days that will require cooling) during the summer for the past couple of decades:
The light and dark blue lines are the two most widely used NASA climate models. The green line shows the equivalent projection based on the futures market. Guess what? When money folks have to hedge the weather, it turns out they listen to climate scientists. Their projections closely match the predictions made by climate models.