July in Barbados (International Airport) is the rainiest month of the year. In July, the weather in Barbados (International Airport) is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Barbados (International Airport) has 24 rainy, 4 sunny, 2 cloudy, and 1 partly cloudy day in July. The rains are usually heavy. July as well as June, August, September, and October is considered the most uncomfortable time to visit Barbados (International Airport).