In August, the weather in Oaxaca de Juárez is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, Oaxaca de Juárez has 21 rainy, 5 cloudy, 3 partly cloudy, and 2 sunny days in August. The rains are usually heavy. August as well as June, July, and September is considered the most uncomfortable time to visit Oaxaca de Juárez.