June in Stellenbosch is the rainiest and the cloudiest month of the year. In June, the weather in Stellenbosch is typically warm. Average daily high temperature in June is about 17 degrees above zero. On average, Stellenbosch has 11 rainy, 11 sunny, and 8 partly cloudy days in June. The rains are usually heavy. June as well as July and August is considered the most uncomfortable time to visit Stellenbosch.