The graph gives information about the yearly temperature level in 3 major cities.
Overall, the highest temperature was reached in Boston, which initially saw the coldest degrees.Melbourne experienced the coldest period. In Paris, the temperature was the average at the beginning and despite some increases in summertime, it stayed in its original degree in the end.
Starting with Boston, it started with the lowest temperature on January at 3°, before the rapid growth till the summer seasons, when temperature reached the peak on August at 33°. Thereafter, the temp sharply decreased on Autumn months, and in the end, again stayed the lowest temperature country at only 5°.
Continuing with Paris and Melbourne, where figures stayed almost unchanged in the end of the period, despite some notable changes in summer time in both countries. Melbourne experienced the coldest period in summer months at 16°. Subsequently, gradually increased to its initial temperature. Conversely, although there were many significant changes over the year, it stayed at the average temperature, started with 8°, notably increased to 24° on July and August similarly, then dropped consistently to 9° on December.