January in Santiago del Estero is the hottest month of the year. In January, the weather in Santiago del Estero is typically hot. Average daily high temperature in January is about 31 degrees above zero. On average, Santiago del Estero has 12 sunny, 10 partly cloudy, 8 rainy, and 1 cloudy day in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Santiago del Estero.