October in Huntsville is the rainiest month of the year. In October, the weather in Huntsville is typically warm. Average daily high temperature in October is about 11 degrees above zero. On average, Huntsville has 14 rainy, 7 partly cloudy, 6 sunny, and 4 cloudy days in October. The rains are usually heavy. October as well as March, April, and November is considered the most uncomfortable time to visit Huntsville.