August in Kalasin is the rainiest and the cloudiest month of the year. In August, the weather in Kalasin is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Kalasin has 25 rainy and 6 cloudy days in August. The rains are usually heavy. August as well as May, June, July, and September is considered the most uncomfortable time to visit Kalasin.