I must say that this is the most amazing visual I have seen in a while. The animation over time shows exactly what the author intended in a very simple and visual way. The colors are not jarring and change with the intensity of the data. The bar chart at the bottom is a little hidden, but perfectly placed not to take away from the main story the author is trying to portray.
I found that this was a perfect visualization example for the trend over time of the temperature data.