The graph demonstrates the information of three big cities (Parls, Boston, Melbourne) about their monthly average temperatures.
Overall, the temperatures of Melbourne decrease rapidly until July and there the temperatures start increasing rest of the year. Moreover, the temperatures of Parls increases until July and then starts decreasing rest of the tear. In addiiton, the temperatures of Boston increases until August then starts falling rest of the year.
In January, the temperatures of Boston and Parls start increasing until July and August respectively from 4 and 8 to 32 and 24 approximately. Furthermore, the temperatures of Boston and Parls start decreasing dramatically rest of the year from 32 and 24 to 5 and 9 approximately respectively.
In January, the temperatures of Melbourne start decreasing continuously untill July from 26 to 16 approximately, then it starts rising dramatically until December from 16 to 26 approximately. Bonton reaches the highest temperature and Boston reaches the lowest temperature among three cities over the year.