January in Narayanganj is the sunniest and the coldest month of the year. In January, the weather in Narayanganj is typically warm. Average daily high temperature in January is about 24 degrees above zero. On average, Narayanganj has 26 sunny, 4 partly cloudy, and 1 rainy day in January. The rains are usually light. January as well as December is considered the most comfortable time to visit Narayanganj.