In September, the weather in San Fernando del Valle de Catamarca is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, San Fernando del Valle de Catamarca has 28 sunny, 1 rainy, and 1 partly cloudy day in September. The rains are usually light. September as well as October is considered the most comfortable time to visit San Fernando del Valle de Catamarca.