The data set was taken from Kaggle (License CC BY-NC-SA 4.0).
The original data set went throw few sorting and cleaning at this jupyter notebook
This visualization is presenting the temperature in majors cities in the world from 1900 to 2013.
It uses the Global Temperature by City table that was sorted by date and the Lat/Long was parsed to coordinates from UTM.
Its temperature sets each city color - Green will be smaller than 10 degrees celsius, Orange between 11 to 22 degrees celsius, and Red are larger than 23 degrees celsius.