August in Mombasa is the coldest month of the year. In August, the weather in Mombasa is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Mombasa has 21 rainy, 9 sunny, and 1 partly cloudy day in August. The rains are usually moderate. August as well as March, April, and May is considered the most uncomfortable time to visit Mombasa.