The line graph displays the mean monthly temperature in three different cities (Paris, Boston, and Melbourne) over the period of a year, from January to December.
Overall, Boston and Paris experienced temperature increases from the beginning of the year until August and July, respectively, before gradually decreasing. On the other hand, Melbourne, starting with the highest temperature, saw a steady decline until July before rising back to its initial level by December.
Boston, starting with the lowest temperature at around 4°C, rose sharply to about 32°C in August, making it the hottest city in summer, before dropping back to 5°C by December. Paris followed a similar pattern, starting at 8°C in January, gradually increasing to just below 25°C by July, remaining stable for a month before dropping to just below 10°C by December.
Melbourne’s temperature started the year at just above 25°C, steadily declining to about 15°C in July, making it the coolest city in summer among the three. Afterwards, the temperature increased again, returning to around 25°C by December.