January in Oaxaca de Juárez is the windiest month of the year. In January, the weather in Oaxaca de Juárez is typically warm. Average daily high temperature in January is about 16 degrees above zero. On average, Oaxaca de Juárez has 17 partly cloudy, 11 sunny, 2 rainy, and 1 cloudy day in January. The rains are usually light.