July in Belize City is the cloudiest month of the year. In July, the weather in Belize City is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Belize City has 28 rainy, 2 partly cloudy, and 1 cloudy day in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Belize City.