September in Saltillo is the rainiest and the cloudiest month of the year. In September, the weather in Saltillo is typically warm. Average daily high temperature in September is about 22 degrees above zero. On average, Saltillo has 16 rainy, 8 sunny, 5 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most uncomfortable time to visit Saltillo.