In August, the weather in Barbados (International Airport) is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Barbados (International Airport) has 24 rainy, 3 sunny, 3 partly cloudy, and 1 cloudy day in August. The rains are usually heavy. August as well as June, July, September, and October is considered the most uncomfortable time to visit Barbados (International Airport).