July in Arusha is the coldest month of the year. In July, the weather in Arusha is typically warm. Average daily high temperature in July is about 21 degrees above zero. On average, Arusha has 14 cloudy, 12 partly cloudy, and 5 sunny days in July. July as well as May, June, August, and September is considered the most comfortable time to visit Arusha.