The first inhabitants were the indigenous people in the region before the city was discovered, Castro was discovered on 19 March 1704, and it became municipality in 1857. In the 1930s, the largest European Immigration happened, they were Dutch, Russians, Italians and Ukrainians.
Economy
Castrolanda is a colony that was founded by Dutch immigrants between 1951 and 1954. Testament to this there is a windmill in Castro. Its economy is based on agricultural production and dairy farming which is one of the most important in this region that is considered the largest dairy in Brazil due to their genetic quality. It has a considerable production of grain, mostly soy and beans. Also having one of the largest agricultural cooperatives in Brazil, which bears the name of the colony.
Geography
Climate
The climate of Castro is oceanic climate (Köppen climate classificationCfb), the average temperature on summer is 25°C, on winter the temperature reaches to 11°C, the temperature rarely drops below 5°C or exceeds 15°C. There's occasionally snow fall on winter. Frost are common on winter. The highest temperature was 35°C on 4 January 1949. The lowest temperature was -7°C on 1 August 1955.
^"Divisão Territorial do Brasil" (in Portuguese). Divisão Territorial do Brasil e Limites Territoriais, Instituto Brasileiro de Geografia e Estatística (IBGE). July 1, 2008. Retrieved December 17, 2009.
