You want to show in a visual way how much rainfall your city in a year. Which would be the best visual aid to use

Explanation:

Creating a timelapse video over the course of a few months (probably around 4-6) which will obviously not be entirley accurate but get a good sense of how much rain there is over that time period. It would be around double the amount of the 4-6 month time period although to get the most accurate results you would need to have the study going for the full year. (Obviously this is a subjective question so you may not like it)