January in Zanzibar is the windiest month of the year. In January, the weather in Zanzibar is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Zanzibar has 18 rainy, 11 sunny, 1 cloudy, and 1 partly cloudy day in January. The rains are usually moderate. January as well as March, April, and May is considered the most uncomfortable time to visit Zanzibar.