July in Muzaffarpur is the rainiest and the cloudiest month of the year. In July, the weather in Muzaffarpur is typically hot. Average daily high temperature in July is about 32 degrees above zero. On average, Muzaffarpur has 30 rainy and 1 sunny day in July. The rains are usually heavy. July as well as June, August, and September is considered the most uncomfortable time to visit Muzaffarpur.