June in Belize City is the rainiest and the cloudiest month of the year. In June, the weather in Belize City is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Belize City has 27 rainy and 3 sunny days in June. The rains are usually heavy. June as well as July, August, September, and October is considered the most uncomfortable time to visit Belize City.