Agrinio is the largest city in the prefecture of Aetoloakarnania. It dominates in West Central Greece and is the commercial and economic center of Aetoloakarnania. The patron saint of Agrinio is Saint Christopher. The memory of the Saint is celebrated on 9 May, a holiday for Agrinio, during which various celebrations are held. The climate of the city of Agrinio varies. The summers are very warm with temperatures often exceeding 40 ° C. Humidity with mild winters characterizes low-altitude areas. At higher altitudes, summers are cool as the snow and the cold weather characterize the winter months.