The graph below highlights the average every month temperatures in three large cities.
In generall,what stands out from the graph is that there were considerable upward trends in the income of Melbourne,while the temperatures of both Paris and Boston saw a considerable fall over the period in question.Another interesting point is that Boston was the most popular city for its temperatures in august,but in december,the temperature in Melbourne was higher than Boston.
Looking at the details,as regards Paris,income started at just over 5 degree in january,then there was a rise gradually over the next three month,at which point it grew rapidly at just under 20 degree until august.Then the figure went down dramatically,finishing at around 5 degree.If we look at Boston,the trend was similar.Having rising remarkably at approximately 15 degree in the first three month,income then went up gradually,reaching nearly 30 degree in august.There was then striking fall to around 5 degree.
By contrast,the income of Melbourne went in the opposite direction.Having declined significantly around 25 degree until april.After that,despite fluctuating to just over 15 degree in august,the figure then rose in the last four month.