August in Kullu is the rainiest and the cloudiest month of the year. In August, the weather in Kullu is typically warm. Average daily high temperature in August is about 16 degrees above zero. On average, Kullu has 16 rainy, 7 sunny, 7 partly cloudy, and 1 cloudy day in August. The rains are usually heavy. August as well as January, February, and December is considered the most uncomfortable time to visit Kullu.