August in Ennis is the rainiest and the warmest month of the year. In August, the weather in Ennis is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Ennis has 18 rainy, 10 partly cloudy, 2 cloudy, and 1 sunny day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Ennis.