Haha, not to worry. Look at the temperature graph. Then the time graph. All I did was basically average the two points for each respective month. The reason why it's "scaled" is that temperatures may range from 30 to 90. Time may range from 10 to 60. Yet, for the "averaging" I scaled each of these as if they're going from 0 to 1. If the given month has the highest temp and highest time, the point will be at 1. If it's the highest temp and lowest time, it'll be at .5. All you need to really know is that I'm averaging the appearance of the two graphs
