July in Vigan is the rainiest month of the year. In July, the weather in Vigan is typically hot. Average daily high temperature in July is about 28 degrees above zero. On average, Vigan has 26 rainy, 2 cloudy, 2 partly cloudy, 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 Vigan.