August in Santa Cruz de la Sierra is the windiest and the sunniest month of the year. In August, the weather in Santa Cruz de la Sierra is typically hot. Average daily high temperature in August is about 27 degrees above zero. On average, Santa Cruz de la Sierra has 25 sunny, 4 partly cloudy, 1 rainy, and 1 cloudy day in August. The rains are usually light. August as well as June and July is considered the most comfortable time to visit Santa Cruz de la Sierra.