What was the geography like in the Ancient Greek City-State of Argos?

The ancient city-state of Argos was built on a plain near a harbor. It was very hot in the summer and very cold in the winter. The soil was poor. The people of the city-state of Argos had trouble growing crops. So, they became leaders in trade. Because they traded with other Greek city-states, they invented their own coinage. This invention made trading a lot easier.