In June, the weather in Ust-Koksa is typically warm. Average daily high temperature in June is about 16 degrees above zero. On average, Ust-Koksa has 20 rainy, 7 sunny, and 3 partly cloudy days in June. The rains are usually heavy. June as well as January, February, April, and May is considered the most uncomfortable time to visit Ust-Koksa.