The Paysandú department is in the western part of Uruguay, along the Uruguay river. It has an area of 13,922 km2 (5,375 sq mi), the third largest department in the country, after the Tacuarembó and Salto departments. The population is 113,124 inhabitants (2011 census) for a population density of 8.1 inhabitants/km2.
There are two chains of low hills in the department. These chains of low and rounded hills are named cuchillas in the country. The two cuchillas in the department are cuchilla de Queguay to the northwest, and cuchilla de Haedo to the southeast.
There is one protected area in the department: Montes del Queguay (Spanish: Área protegida Montes del Queguay); it is around the confluence of the Queguay Grande and Queguay Chico rivers.
The main rivers in the department are:
- Uruguay, to the west and that forms the border with Argentina; and
Queguay Grande, a tributary of the Uruguay river that flows through the department from East to West.
The Köppen climate classification type for the climate in
Paysandú is a "Humid subtropical climate" and of the subtype Cfa.
The average amount of precipitation for the year in Paysandú is 1,196.3 mm (47.1 in). The month with the most precipitation on average is March with 142.2 mm (5.6 in) of precipitation. The month with the least precipitation on average is May with an average of 66 mm (2.6 in).
The average temperature for the year in Paysandú is 17.9 °C (64.2 °F). The warmest month, on average, is January with an average temperature of 24.8 °C (76.6 °F). The coolest month on average is June, with an average temperature of 11.7 °C (53.1 °F).