September in Tlaxcala de Xicoténcatl is the cloudiest month of the year. In September, the weather in Tlaxcala de Xicoténcatl is typically warm. Average daily high temperature in September is about 17 degrees above zero. On average, Tlaxcala de Xicoténcatl has 29 rainy and 1 sunny day in September. The rains are usually heavy. September as well as June, July, and August is considered the most uncomfortable time to visit Tlaxcala de Xicoténcatl.