In June, the weather in Sumon Ishtii-Khem is typically warm. Average daily high temperature in June is about 16 degrees above zero. On average, Sumon Ishtii-Khem has 17 rainy, 7 sunny, 5 partly cloudy, and 1 cloudy day in June. The rains are usually heavy. June as well as January, February, April, and July is considered the most uncomfortable time to visit Sumon Ishtii-Khem.