In the animation above you can tell how the land surface temperature changes throughout the year of 2019. This animation shows how much heat is on the surface on the land per square foot. if you were to look at the legend above to the right of the animation you would be able to tell that Yellow is warmer purple is colder and light blue is the coldest. So, you can tell that in the Northern Hemisphere when the main colors are either light blue or dark blue it is either December, January, February or March.