July in Narayanganj is the rainiest and the cloudiest month of the year. In July, the weather in Narayanganj is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Narayanganj has 31 rainy days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Narayanganj.