Uruguay: Climate & Natural Resources

Uruguay lies entirely within South America's temperate zone, giving it one of the continent's most uniform climates. Classified as humid subtropical under the Köppen system, conditions change little between regions, with cool, windy springs, warm summers, mild autumns, and damp winters. Rainfall is spread fairly evenly through the year and increases gradually from the coast toward the northwestern interior, driven by winter cold fronts and frequent summer thunderstorms. Without mountain ranges to provide shelter, the weather can shift abruptly, including sudden incursions of the pampero, a cold wind blowing in from the Argentine pampas.

Natural pasture has long defined Uruguay's economy: grassland that once blanketed most of the interior still supports large cattle and sheep herds, though it increasingly competes with planted pasture and cropland. Fertile alluvial soils along the western river plain support wheat and rice. Forest cover is limited mainly to narrow stretches along watercourses, where species such as willow and quebracho grow, the latter valued for tanning and dyeing. The country is otherwise water-rich, with a high water table and numerous lakes, and draws hydroelectric power from the Salto Grande Dam, shared with Argentina, and from a reservoir on the Río Negro.

Much of the terrain is gently rolling plain, a transition between Argentina's flat pampas and the hilly uplands of southern Brazil, rising at its highest to Cerro Catedral in the Cuchilla Grande range. Three river systems drain the country toward the Río Uruguay, the Atlantic coast, and the Río de la Plata, with the Río Negro the longest river crossing the interior. A marshy Atlantic shoreline gives way to Laguna Merín near the Brazilian border. National parks and a wildlife reserve protect native species, including pumas and jaguars that still range through remote areas, along with river caimans and coastal seal colonies.