August in Khartoum is the rainiest month of the year. In August, the weather in Khartoum is typically hot. Average daily high temperature in August is about 36 degrees above zero. On average, Khartoum has 15 partly cloudy, 7 sunny, 7 cloudy, and 2 rainy days in August. The rains are usually light. August as well as April, May, June, and July is considered the most uncomfortable time to visit Khartoum.