União da Vitória is classified as a humid subtropical region in the Köppen climate classification. Temperatures on summer can reach 86°F (30°C) and on winter 27°F (-3°C). It is normal to occur frosts and rarely snowfall. União da Vitória lies on the south bank of Iguazu River and at 752 meters above the sea level. The city borders its interstate neighbour Porto União, Santa Catarina; both are known as "Gêmeas do Iguaçu" (Iguazu Twins). The city is 238 kilometers far from Curitiba, the capital of Paraná State and the municipality's area is of 720 square kilometers and the population density is of 72 people per square kilometer. Being located between the Second and the Third Plateaus, the city's topography is characterized by extrusive igneous mountains origined in the Paraná Flood Basalt; making this region full of waterfalls and creeks nationally known. The city is served by José Cleto Airport.