In October, the weather in Tehuacan is typically warm. Average daily high temperature in October is about 18 degrees above zero. On average, Tehuacan has 19 rainy, 7 cloudy, 3 sunny, and 2 partly cloudy days in October. The rains are usually heavy. October as well as May, June, July, and August is considered the most uncomfortable time to visit Tehuacan.